diff options
Diffstat (limited to 'sound/core')
30 files changed, 623 insertions, 798 deletions
diff --git a/sound/core/control.c b/sound/core/control.c index eeb691d1911f..196a6fe100ca 100644 --- a/sound/core/control.c +++ b/sound/core/control.c @@ -192,36 +192,41 @@ void snd_ctl_notify(struct snd_card *card, unsigned int mask, EXPORT_SYMBOL(snd_ctl_notify); /** - * snd_ctl_new - create a control instance from the template - * @control: the control template - * @access: the default control access + * snd_ctl_new - create a new control instance with some elements + * @kctl: the pointer to store new control instance + * @count: the number of elements in this control + * @access: the default access flags for elements in this control + * @file: given when locking these elements * - * Allocates a new struct snd_kcontrol instance and copies the given template - * to the new instance. It does not copy volatile data (access). + * Allocates a memory object for a new control instance. The instance has + * elements as many as the given number (@count). Each element has given + * access permissions (@access). Each element is locked when @file is given. * - * Return: The pointer of the new instance, or %NULL on failure. + * Return: 0 on success, error code on failure */ -static struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol *control, - unsigned int access) +static int snd_ctl_new(struct snd_kcontrol **kctl, unsigned int count, + unsigned int access, struct snd_ctl_file *file) { - struct snd_kcontrol *kctl; + unsigned int size; unsigned int idx; - if (snd_BUG_ON(!control || !control->count)) - return NULL; + if (count == 0 || count > MAX_CONTROL_COUNT) + return -EINVAL; - if (control->count > MAX_CONTROL_COUNT) - return NULL; + size = sizeof(struct snd_kcontrol); + size += sizeof(struct snd_kcontrol_volatile) * count; - kctl = kzalloc(sizeof(*kctl) + sizeof(struct snd_kcontrol_volatile) * control->count, GFP_KERNEL); - if (kctl == NULL) { - pr_err("ALSA: Cannot allocate control instance\n"); - return NULL; + *kctl = kzalloc(size, GFP_KERNEL); + if (!*kctl) + return -ENOMEM; + + for (idx = 0; idx < count; idx++) { + (*kctl)->vd[idx].access = access; + (*kctl)->vd[idx].owner = file; } - *kctl = *control; - for (idx = 0; idx < kctl->count; idx++) - kctl->vd[idx].access = access; - return kctl; + (*kctl)->count = count; + + return 0; } /** @@ -238,37 +243,53 @@ static struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol *control, struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new *ncontrol, void *private_data) { - struct snd_kcontrol kctl; + struct snd_kcontrol *kctl; + unsigned int count; unsigned int access; + int err; if (snd_BUG_ON(!ncontrol || !ncontrol->info)) return NULL; - memset(&kctl, 0, sizeof(kctl)); - kctl.id.iface = ncontrol->iface; - kctl.id.device = ncontrol->device; - kctl.id.subdevice = ncontrol->subdevice; + + count = ncontrol->count; + if (count == 0) + count = 1; + + access = ncontrol->access; + if (access == 0) + access = SNDRV_CTL_ELEM_ACCESS_READWRITE; + access &= (SNDRV_CTL_ELEM_ACCESS_READWRITE | + SNDRV_CTL_ELEM_ACCESS_VOLATILE | + SNDRV_CTL_ELEM_ACCESS_INACTIVE | + SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE | + SNDRV_CTL_ELEM_ACCESS_TLV_COMMAND | + SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK); + + err = snd_ctl_new(&kctl, count, access, NULL); + if (err < 0) + return NULL; + + /* The 'numid' member is decided when calling snd_ctl_add(). */ + kctl->id.iface = ncontrol->iface; + kctl->id.device = ncontrol->device; + kctl->id.subdevice = ncontrol->subdevice; if (ncontrol->name) { - strlcpy(kctl.id.name, ncontrol->name, sizeof(kctl.id.name)); - if (strcmp(ncontrol->name, kctl.id.name) != 0) + strlcpy(kctl->id.name, ncontrol->name, sizeof(kctl->id.name)); + if (strcmp(ncontrol->name, kctl->id.name) != 0) pr_warn("ALSA: Control name '%s' truncated to '%s'\n", - ncontrol->name, kctl.id.name); + ncontrol->name, kctl->id.name); } - kctl.id.index = ncontrol->index; - kctl.count = ncontrol->count ? ncontrol->count : 1; - access = ncontrol->access == 0 ? SNDRV_CTL_ELEM_ACCESS_READWRITE : - (ncontrol->access & (SNDRV_CTL_ELEM_ACCESS_READWRITE| - SNDRV_CTL_ELEM_ACCESS_VOLATILE| - SNDRV_CTL_ELEM_ACCESS_INACTIVE| - SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE| - SNDRV_CTL_ELEM_ACCESS_TLV_COMMAND| - SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK)); - kctl.info = ncontrol->info; - kctl.get = ncontrol->get; - kctl.put = ncontrol->put; - kctl.tlv.p = ncontrol->tlv.p; - kctl.private_value = ncontrol->private_value; - kctl.private_data = private_data; - return snd_ctl_new(&kctl, access); + kctl->id.index = ncontrol->index; + + kctl->info = ncontrol->info; + kctl->get = ncontrol->get; + kctl->put = ncontrol->put; + kctl->tlv.p = ncontrol->tlv.p; + + kctl->private_value = ncontrol->private_value; + kctl->private_data = private_data; + + return kctl; } EXPORT_SYMBOL(snd_ctl_new1); @@ -557,6 +578,7 @@ error: * * Finds the control instance with the given id, and activate or * inactivate the control together with notification, if changed. + * The given ID data is filled with full information. * * Return: 0 if unchanged, 1 if changed, or a negative error code on failure. */ @@ -586,6 +608,7 @@ int snd_ctl_activate_id(struct snd_card *card, struct snd_ctl_elem_id *id, goto unlock; vd->access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE; } + snd_ctl_build_ioff(id, kctl, index_offset); ret = 1; unlock: up_write(&card->controls_rwsem); @@ -1006,7 +1029,7 @@ static int snd_ctl_elem_unlock(struct snd_ctl_file *file, struct user_element { struct snd_ctl_elem_info info; struct snd_card *card; - void *elem_data; /* element data */ + char *elem_data; /* element data */ unsigned long elem_data_size; /* size of element data in bytes */ void *tlv_data; /* TLV data */ unsigned long tlv_data_size; /* TLV data size */ @@ -1017,8 +1040,12 @@ static int snd_ctl_elem_user_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { struct user_element *ue = kcontrol->private_data; + unsigned int offset; + offset = snd_ctl_get_ioff(kcontrol, &uinfo->id); *uinfo = ue->info; + snd_ctl_build_ioff(&uinfo->id, kcontrol, offset); + return 0; } @@ -1028,10 +1055,13 @@ static int snd_ctl_elem_user_enum_info(struct snd_kcontrol *kcontrol, struct user_element *ue = kcontrol->private_data; const char *names; unsigned int item; + unsigned int offset; item = uinfo->value.enumerated.item; + offset = snd_ctl_get_ioff(kcontrol, &uinfo->id); *uinfo = ue->info; + snd_ctl_build_ioff(&uinfo->id, kcontrol, offset); item = min(item, uinfo->value.enumerated.items - 1); uinfo->value.enumerated.item = item; @@ -1048,9 +1078,12 @@ static int snd_ctl_elem_user_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct user_element *ue = kcontrol->private_data; + unsigned int size = ue->elem_data_size; + char *src = ue->elem_data + + snd_ctl_get_ioff(kcontrol, &ucontrol->id) * size; mutex_lock(&ue->card->user_ctl_lock); - memcpy(&ucontrol->value, ue->elem_data, ue->elem_data_size); + memcpy(&ucontrol->value, src, size); mutex_unlock(&ue->card->user_ctl_lock); return 0; } @@ -1060,11 +1093,14 @@ static int snd_ctl_elem_user_put(struct snd_kcontrol *kcontrol, { int change; struct user_element *ue = kcontrol->private_data; + unsigned int size = ue->elem_data_size; + char *dst = ue->elem_data + + snd_ctl_get_ioff(kcontrol, &ucontrol->id) * size; mutex_lock(&ue->card->user_ctl_lock); - change = memcmp(&ucontrol->value, ue->elem_data, ue->elem_data_size) != 0; + change = memcmp(&ucontrol->value, dst, size) != 0; if (change) - memcpy(ue->elem_data, &ucontrol->value, ue->elem_data_size); + memcpy(dst, &ucontrol->value, size); mutex_unlock(&ue->card->user_ctl_lock); return change; } @@ -1078,7 +1114,7 @@ static int snd_ctl_elem_user_tlv(struct snd_kcontrol *kcontrol, int change = 0; void *new_data; - if (op_flag > 0) { + if (op_flag == SNDRV_CTL_TLV_OP_WRITE) { if (size > 1024 * 128) /* sane value */ return -EINVAL; @@ -1161,84 +1197,103 @@ static void snd_ctl_elem_user_free(struct snd_kcontrol *kcontrol) static int snd_ctl_elem_add(struct snd_ctl_file *file, struct snd_ctl_elem_info *info, int replace) { + /* The capacity of struct snd_ctl_elem_value.value.*/ + static const unsigned int value_sizes[] = { + [SNDRV_CTL_ELEM_TYPE_BOOLEAN] = sizeof(long), + [SNDRV_CTL_ELEM_TYPE_INTEGER] = sizeof(long), + [SNDRV_CTL_ELEM_TYPE_ENUMERATED] = sizeof(unsigned int), + [SNDRV_CTL_ELEM_TYPE_BYTES] = sizeof(unsigned char), + [SNDRV_CTL_ELEM_TYPE_IEC958] = sizeof(struct snd_aes_iec958), + [SNDRV_CTL_ELEM_TYPE_INTEGER64] = sizeof(long long), + }; + static const unsigned int max_value_counts[] = { + [SNDRV_CTL_ELEM_TYPE_BOOLEAN] = 128, + [SNDRV_CTL_ELEM_TYPE_INTEGER] = 128, + [SNDRV_CTL_ELEM_TYPE_ENUMERATED] = 128, + [SNDRV_CTL_ELEM_TYPE_BYTES] = 512, + [SNDRV_CTL_ELEM_TYPE_IEC958] = 1, + [SNDRV_CTL_ELEM_TYPE_INTEGER64] = 64, + }; struct snd_card *card = file->card; - struct snd_kcontrol kctl, *_kctl; + struct snd_kcontrol *kctl; + unsigned int count; unsigned int access; long private_size; struct user_element *ue; - int idx, err; + unsigned int offset; + int err; - if (info->count < 1) - return -EINVAL; if (!*info->id.name) return -EINVAL; if (strnlen(info->id.name, sizeof(info->id.name)) >= sizeof(info->id.name)) return -EINVAL; - access = info->access == 0 ? SNDRV_CTL_ELEM_ACCESS_READWRITE : - (info->access & (SNDRV_CTL_ELEM_ACCESS_READWRITE| - SNDRV_CTL_ELEM_ACCESS_INACTIVE| - SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE)); - info->id.numid = 0; - memset(&kctl, 0, sizeof(kctl)); + /* Delete a control to replace them if needed. */ if (replace) { + info->id.numid = 0; err = snd_ctl_remove_user_ctl(file, &info->id); if (err) return err; } - if (card->user_ctl_count >= MAX_USER_CONTROLS) + /* + * The number of userspace controls are counted control by control, + * not element by element. + */ + if (card->user_ctl_count + 1 > MAX_USER_CONTROLS) return -ENOMEM; - memcpy(&kctl.id, &info->id, sizeof(info->id)); - kctl.count = info->owner ? info->owner : 1; - access |= SNDRV_CTL_ELEM_ACCESS_USER; - if (info->type == SNDRV_CTL_ELEM_TYPE_ENUMERATED) - kctl.info = snd_ctl_elem_user_enum_info; - else - kctl.info = snd_ctl_elem_user_info; - if (access & SNDRV_CTL_ELEM_ACCESS_READ) - kctl.get = snd_ctl_elem_user_get; - if (access & SNDRV_CTL_ELEM_ACCESS_WRITE) - kctl.put = snd_ctl_elem_user_put; - if (access & SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE) { - kctl.tlv.c = snd_ctl_elem_user_tlv; + /* Check the number of elements for this userspace control. */ + count = info->owner; + if (count == 0) + count = 1; + + /* Arrange access permissions if needed. */ + access = info->access; + if (access == 0) + access = SNDRV_CTL_ELEM_ACCESS_READWRITE; + access &= (SNDRV_CTL_ELEM_ACCESS_READWRITE | + SNDRV_CTL_ELEM_ACCESS_INACTIVE | + SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE); + if (access & SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE) access |= SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK; - } - switch (info->type) { - case SNDRV_CTL_ELEM_TYPE_BOOLEAN: - case SNDRV_CTL_ELEM_TYPE_INTEGER: - private_size = sizeof(long); - if (info->count > 128) - return -EINVAL; - break; - case SNDRV_CTL_ELEM_TYPE_INTEGER64: - private_size = sizeof(long long); - if (info->count > 64) - return -EINVAL; - break; - case SNDRV_CTL_ELEM_TYPE_ENUMERATED: - private_size = sizeof(unsigned int); - if (info->count > 128 || info->value.enumerated.items == 0) - return -EINVAL; - break; - case SNDRV_CTL_ELEM_TYPE_BYTES: - private_size = sizeof(unsigned char); - if (info->count > 512) - return -EINVAL; - break; - case SNDRV_CTL_ELEM_TYPE_IEC958: - private_size = sizeof(struct snd_aes_iec958); - if (info->count != 1) - return -EINVAL; - break; - default: + access |= SNDRV_CTL_ELEM_ACCESS_USER; + + /* + * Check information and calculate the size of data specific to + * this userspace control. + */ + if (info->type < SNDRV_CTL_ELEM_TYPE_BOOLEAN || + info->type > SNDRV_CTL_ELEM_TYPE_INTEGER64) return -EINVAL; - } - private_size *= info->count; - ue = kzalloc(sizeof(struct user_element) + private_size, GFP_KERNEL); - if (ue == NULL) + if (info->type == SNDRV_CTL_ELEM_TYPE_ENUMERATED && + info->value.enumerated.items == 0) + return -EINVAL; + if (info->count < 1 || + info->count > max_value_counts[info->type]) + return -EINVAL; + private_size = value_sizes[info->type] * info->count; + + /* + * Keep memory object for this userspace control. After passing this + * code block, the instance should be freed by snd_ctl_free_one(). + * + * Note that these elements in this control are locked. + */ + err = snd_ctl_new(&kctl, count, access, file); + if (err < 0) + return err; + memcpy(&kctl->id, &info->id, sizeof(kctl->id)); + kctl->private_data = kzalloc(sizeof(struct user_element) + private_size * count, + GFP_KERNEL); + if (kctl->private_data == NULL) { + kfree(kctl); return -ENOMEM; + } + kctl->private_free = snd_ctl_elem_user_free; + + /* Set private data for this userspace control. */ + ue = (struct user_element *)kctl->private_data; ue->card = card; ue->info = *info; ue->info.access = 0; @@ -1247,23 +1302,36 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file, if (ue->info.type == SNDRV_CTL_ELEM_TYPE_ENUMERATED) { err = snd_ctl_elem_init_enum_names(ue); if (err < 0) { - kfree(ue); + snd_ctl_free_one(kctl); return err; } } - kctl.private_free = snd_ctl_elem_user_free; - _kctl = snd_ctl_new(&kctl, access); - if (_kctl == NULL) { - kfree(ue->priv_data); - kfree(ue); - return -ENOMEM; - } - _kctl->private_data = ue; - for (idx = 0; idx < _kctl->count; idx++) - _kctl->vd[idx].owner = file; - err = snd_ctl_add(card, _kctl); + + /* Set callback functions. */ + if (info->type == SNDRV_CTL_ELEM_TYPE_ENUMERATED) + kctl->info = snd_ctl_elem_user_enum_info; + else + kctl->info = snd_ctl_elem_user_info; + if (access & SNDRV_CTL_ELEM_ACCESS_READ) + kctl->get = snd_ctl_elem_user_get; + if (access & SNDRV_CTL_ELEM_ACCESS_WRITE) + kctl->put = snd_ctl_elem_user_put; + if (access & SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE) + kctl->tlv.c = snd_ctl_elem_user_tlv; + + /* This function manage to free the instance on failure. */ + err = snd_ctl_add(card, kctl); if (err < 0) return err; + offset = snd_ctl_get_ioff(kctl, &info->id); + snd_ctl_build_ioff(&info->id, kctl, offset); + /* + * Here we cannot fill any field for the number of elements added by + * this operation because there're no specific fields. The usage of + * 'owner' field for this purpose may cause any bugs to userspace + * applications because the field originally means PID of a process + * which locks the element. + */ down_write(&card->controls_rwsem); card->user_ctl_count++; @@ -1276,9 +1344,19 @@ static int snd_ctl_elem_add_user(struct snd_ctl_file *file, struct snd_ctl_elem_info __user *_info, int replace) { struct snd_ctl_elem_info info; + int err; + if (copy_from_user(&info, _info, sizeof(info))) return -EFAULT; - return snd_ctl_elem_add(file, &info, replace); + err = snd_ctl_elem_add(file, &info, replace); + if (err < 0) + return err; + if (copy_to_user(_info, &info, sizeof(info))) { + snd_ctl_remove_user_ctl(file, &info.id); + return -EFAULT; + } + + return 0; } static int snd_ctl_elem_remove(struct snd_ctl_file *file, @@ -1338,9 +1416,12 @@ static int snd_ctl_tlv_ioctl(struct snd_ctl_file *file, goto __kctl_end; } vd = &kctl->vd[tlv.numid - kctl->id.numid]; - if ((op_flag == 0 && (vd->access & SNDRV_CTL_ELEM_ACCESS_TLV_READ) == 0) || - (op_flag > 0 && (vd->access & SNDRV_CTL_ELEM_ACCESS_TLV_WRITE) == 0) || - (op_flag < 0 && (vd->access & SNDRV_CTL_ELEM_ACCESS_TLV_COMMAND) == 0)) { + if ((op_flag == SNDRV_CTL_TLV_OP_READ && + (vd->access & SNDRV_CTL_ELEM_ACCESS_TLV_READ) == 0) || + (op_flag == SNDRV_CTL_TLV_OP_WRITE && + (vd->access & SNDRV_CTL_ELEM_ACCESS_TLV_WRITE) == 0) || + (op_flag == SNDRV_CTL_TLV_OP_CMD && + (vd->access & SNDRV_CTL_ELEM_ACCESS_TLV_COMMAND) == 0)) { err = -ENXIO; goto __kctl_end; } @@ -1357,7 +1438,7 @@ static int snd_ctl_tlv_ioctl(struct snd_ctl_file *file, return 0; } } else { - if (op_flag) { + if (op_flag != SNDRV_CTL_TLV_OP_READ) { err = -ENXIO; goto __kctl_end; } diff --git a/sound/core/device.c b/sound/core/device.c index 41bec3075ae5..8918838b1999 100644 --- a/sound/core/device.c +++ b/sound/core/device.c @@ -50,10 +50,8 @@ int snd_device_new(struct snd_card *card, enum snd_device_type type, if (snd_BUG_ON(!card || !device_data || !ops)) return -ENXIO; dev = kzalloc(sizeof(*dev), GFP_KERNEL); - if (dev == NULL) { - dev_err(card->dev, "Cannot allocate device, type=%d\n", type); + if (!dev) return -ENOMEM; - } INIT_LIST_HEAD(&dev->list); dev->card = card; dev->type = type; @@ -73,7 +71,7 @@ int snd_device_new(struct snd_card *card, enum snd_device_type type, } EXPORT_SYMBOL(snd_device_new); -static int __snd_device_disconnect(struct snd_device *dev) +static void __snd_device_disconnect(struct snd_device *dev) { if (dev->state == SNDRV_DEV_REGISTERED) { if (dev->ops->dev_disconnect && @@ -81,7 +79,6 @@ static int __snd_device_disconnect(struct snd_device *dev) dev_err(dev->card->dev, "device disconnect failure\n"); dev->state = SNDRV_DEV_DISCONNECTED; } - return 0; } static void __snd_device_free(struct snd_device *dev) @@ -109,6 +106,34 @@ static struct snd_device *look_for_dev(struct snd_card *card, void *device_data) } /** + * snd_device_disconnect - disconnect the device + * @card: the card instance + * @device_data: the data pointer to disconnect + * + * Turns the device into the disconnection state, invoking + * dev_disconnect callback, if the device was already registered. + * + * Usually called from snd_card_disconnect(). + * + * Return: Zero if successful, or a negative error code on failure or if the + * device not found. + */ +void snd_device_disconnect(struct snd_card *card, void *device_data) +{ + struct snd_device *dev; + + if (snd_BUG_ON(!card || !device_data)) + return; + dev = look_for_dev(card, device_data); + if (dev) + __snd_device_disconnect(dev); + else + dev_dbg(card->dev, "device disconnect %p (from %pF), not found\n", + device_data, __builtin_return_address(0)); +} +EXPORT_SYMBOL_GPL(snd_device_disconnect); + +/** * snd_device_free - release the device from the card * @card: the card instance * @device_data: the data pointer to release @@ -195,18 +220,14 @@ int snd_device_register_all(struct snd_card *card) * disconnect all the devices on the card. * called from init.c */ -int snd_device_disconnect_all(struct snd_card *card) +void snd_device_disconnect_all(struct snd_card *card) { struct snd_device *dev; - int err = 0; if (snd_BUG_ON(!card)) - return -ENXIO; - list_for_each_entry_reverse(dev, &card->devices, list) { - if (__snd_device_disconnect(dev) < 0) - err = -ENXIO; - } - return err; + return; + list_for_each_entry_reverse(dev, &card->devices, list) + __snd_device_disconnect(dev); } /* diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c index 84244a5143cf..51692c8a39ea 100644 --- a/sound/core/hwdep.c +++ b/sound/core/hwdep.c @@ -378,10 +378,8 @@ int snd_hwdep_new(struct snd_card *card, char *id, int device, if (rhwdep) *rhwdep = NULL; hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL); - if (hwdep == NULL) { - dev_err(card->dev, "hwdep: cannot allocate\n"); + if (!hwdep) return -ENOMEM; - } init_waitqueue_head(&hwdep->open_wait); mutex_init(&hwdep->open_mutex); diff --git a/sound/core/init.c b/sound/core/init.c index 35419054821c..04734e047bfe 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -400,7 +400,6 @@ static const struct file_operations snd_shutdown_f_ops = int snd_card_disconnect(struct snd_card *card) { struct snd_monitor_file *mfile; - int err; if (!card) return -EINVAL; @@ -445,9 +444,7 @@ int snd_card_disconnect(struct snd_card *card) #endif /* notify all devices that we are disconnected */ - err = snd_device_disconnect_all(card); - if (err < 0) - dev_err(card->dev, "not all devices for card %i can be disconnected\n", card->number); + snd_device_disconnect_all(card); snd_info_card_disconnect(card); if (card->registered) { diff --git a/sound/core/oss/mixer_oss.c b/sound/core/oss/mixer_oss.c index 5e6349f00ecd..056f8e274851 100644 --- a/sound/core/oss/mixer_oss.c +++ b/sound/core/oss/mixer_oss.c @@ -1212,10 +1212,8 @@ static void snd_mixer_oss_proc_write(struct snd_info_entry *entry, /* not changed */ goto __unlock; tbl = kmalloc(sizeof(*tbl), GFP_KERNEL); - if (! tbl) { - pr_err("ALSA: mixer_oss: no memory\n"); + if (!tbl) goto __unlock; - } tbl->oss_id = ch; tbl->name = kstrdup(str, GFP_KERNEL); if (! tbl->name) { diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c index 80423a4ccab6..58550cc93f28 100644 --- a/sound/core/oss/pcm_oss.c +++ b/sound/core/oss/pcm_oss.c @@ -854,7 +854,6 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream) params = kmalloc(sizeof(*params), GFP_KERNEL); sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); if (!sw_params || !params || !sparams) { - pcm_dbg(substream->pcm, "No memory\n"); err = -ENOMEM; goto failure; } diff --git a/sound/core/pcm.c b/sound/core/pcm.c index 0345e53a340c..b25bcf5b8644 100644 --- a/sound/core/pcm.c +++ b/sound/core/pcm.c @@ -49,8 +49,6 @@ static struct snd_pcm *snd_pcm_get(struct snd_card *card, int device) struct snd_pcm *pcm; list_for_each_entry(pcm, &snd_pcm_devices, list) { - if (pcm->internal) - continue; if (pcm->card == card && pcm->device == device) return pcm; } @@ -62,8 +60,6 @@ static int snd_pcm_next(struct snd_card *card, int device) struct snd_pcm *pcm; list_for_each_entry(pcm, &snd_pcm_devices, list) { - if (pcm->internal) - continue; if (pcm->card == card && pcm->device > device) return pcm->device; else if (pcm->card->number > card->number) @@ -76,6 +72,9 @@ static int snd_pcm_add(struct snd_pcm *newpcm) { struct snd_pcm *pcm; + if (newpcm->internal) + return 0; + list_for_each_entry(pcm, &snd_pcm_devices, list) { if (pcm->card == newpcm->card && pcm->device == newpcm->device) return -EBUSY; @@ -344,11 +343,8 @@ static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, return; info = kmalloc(sizeof(*info), GFP_KERNEL); - if (! info) { - pcm_dbg(substream->pcm, - "snd_pcm_proc_info_read: cannot malloc\n"); + if (!info) return; - } err = snd_pcm_info(substream, info); if (err < 0) { @@ -718,10 +714,8 @@ int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) prev = NULL; for (idx = 0, prev = NULL; idx < substream_count; idx++) { substream = kzalloc(sizeof(*substream), GFP_KERNEL); - if (substream == NULL) { - pcm_err(pcm, "Cannot allocate PCM substream\n"); + if (!substream) return -ENOMEM; - } substream->pcm = pcm; substream->pstr = pstr; substream->number = idx; @@ -775,13 +769,14 @@ static int _snd_pcm_new(struct snd_card *card, const char *id, int device, if (rpcm) *rpcm = NULL; pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); - if (pcm == NULL) { - dev_err(card->dev, "Cannot allocate PCM\n"); + if (!pcm) return -ENOMEM; - } pcm->card = card; pcm->device = device; pcm->internal = internal; + mutex_init(&pcm->open_mutex); + init_waitqueue_head(&pcm->open_wait); + INIT_LIST_HEAD(&pcm->list); if (id) strlcpy(pcm->id, id, sizeof(pcm->id)); if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { @@ -792,8 +787,6 @@ static int _snd_pcm_new(struct snd_card *card, const char *id, int device, snd_pcm_free(pcm); return err; } - mutex_init(&pcm->open_mutex); - init_waitqueue_head(&pcm->open_wait); if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { snd_pcm_free(pcm); return err; @@ -888,8 +881,9 @@ static int snd_pcm_free(struct snd_pcm *pcm) if (!pcm) return 0; - list_for_each_entry(notify, &snd_pcm_notify_list, list) { - notify->n_unregister(pcm); + if (!pcm->internal) { + list_for_each_entry(notify, &snd_pcm_notify_list, list) + notify->n_unregister(pcm); } if (pcm->private_free) pcm->private_free(pcm); @@ -919,6 +913,9 @@ int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, if (snd_BUG_ON(!pcm || !rsubstream)) return -ENXIO; + if (snd_BUG_ON(stream != SNDRV_PCM_STREAM_PLAYBACK && + stream != SNDRV_PCM_STREAM_CAPTURE)) + return -EINVAL; *rsubstream = NULL; pstr = &pcm->streams[stream]; if (pstr->substream == NULL || pstr->substream_count == 0) @@ -927,25 +924,14 @@ int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, card = pcm->card; prefer_subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_PCM); - switch (stream) { - case SNDRV_PCM_STREAM_PLAYBACK: - if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { - for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) { - if (SUBSTREAM_BUSY(substream)) - return -EAGAIN; - } - } - break; - case SNDRV_PCM_STREAM_CAPTURE: - if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { - for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) { - if (SUBSTREAM_BUSY(substream)) - return -EAGAIN; - } + if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { + int opposite = !stream; + + for (substream = pcm->streams[opposite].substream; substream; + substream = substream->next) { + if (SUBSTREAM_BUSY(substream)) + return -EAGAIN; } - break; - default: - return -EINVAL; } if (file->f_flags & O_APPEND) { @@ -968,15 +954,12 @@ int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, return 0; } - if (prefer_subdevice >= 0) { - for (substream = pstr->substream; substream; substream = substream->next) - if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice) - goto __ok; - } - for (substream = pstr->substream; substream; substream = substream->next) - if (!SUBSTREAM_BUSY(substream)) + for (substream = pstr->substream; substream; substream = substream->next) { + if (!SUBSTREAM_BUSY(substream) && + (prefer_subdevice == -1 || + substream->number == prefer_subdevice)) break; - __ok: + } if (substream == NULL) return -EAGAIN; @@ -1086,15 +1069,16 @@ static int snd_pcm_dev_register(struct snd_device *device) if (snd_BUG_ON(!device || !device->device_data)) return -ENXIO; pcm = device->device_data; + if (pcm->internal) + return 0; + mutex_lock(®ister_mutex); err = snd_pcm_add(pcm); - if (err) { - mutex_unlock(®ister_mutex); - return err; - } + if (err) + goto unlock; for (cidx = 0; cidx < 2; cidx++) { int devtype = -1; - if (pcm->streams[cidx].substream == NULL || pcm->internal) + if (pcm->streams[cidx].substream == NULL) continue; switch (cidx) { case SNDRV_PCM_STREAM_PLAYBACK: @@ -1109,9 +1093,8 @@ static int snd_pcm_dev_register(struct snd_device *device) &snd_pcm_f_ops[cidx], pcm, &pcm->streams[cidx].dev); if (err < 0) { - list_del(&pcm->list); - mutex_unlock(®ister_mutex); - return err; + list_del_init(&pcm->list); + goto unlock; } for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) @@ -1121,8 +1104,9 @@ static int snd_pcm_dev_register(struct snd_device *device) list_for_each_entry(notify, &snd_pcm_notify_list, list) notify->n_register(pcm); + unlock: mutex_unlock(®ister_mutex); - return 0; + return err; } static int snd_pcm_dev_disconnect(struct snd_device *device) @@ -1133,13 +1117,10 @@ static int snd_pcm_dev_disconnect(struct snd_device *device) int cidx; mutex_lock(®ister_mutex); - if (list_empty(&pcm->list)) - goto unlock; - mutex_lock(&pcm->open_mutex); wake_up(&pcm->open_wait); list_del_init(&pcm->list); - for (cidx = 0; cidx < 2; cidx++) + for (cidx = 0; cidx < 2; cidx++) { for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) { snd_pcm_stream_lock_irq(substream); if (substream->runtime) { @@ -1149,18 +1130,20 @@ static int snd_pcm_dev_disconnect(struct snd_device *device) } snd_pcm_stream_unlock_irq(substream); } - list_for_each_entry(notify, &snd_pcm_notify_list, list) { - notify->n_disconnect(pcm); + } + if (!pcm->internal) { + list_for_each_entry(notify, &snd_pcm_notify_list, list) + notify->n_disconnect(pcm); } for (cidx = 0; cidx < 2; cidx++) { - snd_unregister_device(&pcm->streams[cidx].dev); + if (!pcm->internal) + snd_unregister_device(&pcm->streams[cidx].dev); if (pcm->streams[cidx].chmap_kctl) { snd_ctl_remove(pcm->card, pcm->streams[cidx].chmap_kctl); pcm->streams[cidx].chmap_kctl = NULL; } } mutex_unlock(&pcm->open_mutex); - unlock: mutex_unlock(®ister_mutex); return 0; } diff --git a/sound/core/pcm_compat.c b/sound/core/pcm_compat.c index 2d957ba63557..b48b434444ed 100644 --- a/sound/core/pcm_compat.c +++ b/sound/core/pcm_compat.c @@ -194,18 +194,30 @@ struct snd_pcm_status32 { u32 avail_max; u32 overrange; s32 suspended_state; - u32 reserved_alignment; + u32 audio_tstamp_data; struct compat_timespec audio_tstamp; - unsigned char reserved[56-sizeof(struct compat_timespec)]; + struct compat_timespec driver_tstamp; + u32 audio_tstamp_accuracy; + unsigned char reserved[52-2*sizeof(struct compat_timespec)]; } __attribute__((packed)); static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream, - struct snd_pcm_status32 __user *src) + struct snd_pcm_status32 __user *src, + bool ext) { struct snd_pcm_status status; int err; + memset(&status, 0, sizeof(status)); + /* + * with extension, parameters are read/write, + * get audio_tstamp_data from user, + * ignore rest of status structure + */ + if (ext && get_user(status.audio_tstamp_data, + (u32 __user *)(&src->audio_tstamp_data))) + return -EFAULT; err = snd_pcm_status(substream, &status); if (err < 0) return err; @@ -222,7 +234,10 @@ static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream, put_user(status.avail_max, &src->avail_max) || put_user(status.overrange, &src->overrange) || put_user(status.suspended_state, &src->suspended_state) || - compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp)) + put_user(status.audio_tstamp_data, &src->audio_tstamp_data) || + compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp) || + compat_put_timespec(&status.driver_tstamp, &src->driver_tstamp) || + put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy)) return -EFAULT; return err; @@ -457,6 +472,7 @@ enum { SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32), SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32), SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32), + SNDRV_PCM_IOCTL_STATUS_EXT32 = _IOWR('A', 0x24, struct snd_pcm_status32), SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32), SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32), SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32), @@ -517,7 +533,9 @@ static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned l case SNDRV_PCM_IOCTL_SW_PARAMS32: return snd_pcm_ioctl_sw_params_compat(substream, argp); case SNDRV_PCM_IOCTL_STATUS32: - return snd_pcm_status_user_compat(substream, argp); + return snd_pcm_status_user_compat(substream, argp, false); + case SNDRV_PCM_IOCTL_STATUS_EXT32: + return snd_pcm_status_user_compat(substream, argp, true); case SNDRV_PCM_IOCTL_SYNC_PTR32: return snd_pcm_ioctl_sync_ptr_compat(substream, argp); case SNDRV_PCM_IOCTL_CHANNEL_INFO32: diff --git a/sound/core/pcm_dmaengine.c b/sound/core/pcm_dmaengine.c index 6542c4083594..fba365a78390 100644 --- a/sound/core/pcm_dmaengine.c +++ b/sound/core/pcm_dmaengine.c @@ -289,7 +289,7 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_request_channel); * * The function should usually be called from the pcm open callback. Note that * this function will use private_data field of the substream's runtime. So it - * is not availabe to your pcm driver implementation. + * is not available to your pcm driver implementation. */ int snd_dmaengine_pcm_open(struct snd_pcm_substream *substream, struct dma_chan *chan) @@ -328,7 +328,7 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_open); * This function will request a DMA channel using the passed filter function and * data. The function should usually be called from the pcm open callback. Note * that this function will use private_data field of the substream's runtime. So - * it is not availabe to your pcm driver implementation. + * it is not available to your pcm driver implementation. */ int snd_dmaengine_pcm_open_request_chan(struct snd_pcm_substream *substream, dma_filter_fn filter_fn, void *filter_data) diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index ffd656012ab8..ac6b33f3779c 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -232,6 +232,49 @@ int snd_pcm_update_state(struct snd_pcm_substream *substream, return 0; } +static void update_audio_tstamp(struct snd_pcm_substream *substream, + struct timespec *curr_tstamp, + struct timespec *audio_tstamp) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + u64 audio_frames, audio_nsecs; + struct timespec driver_tstamp; + + if (runtime->tstamp_mode != SNDRV_PCM_TSTAMP_ENABLE) + return; + + if (!(substream->ops->get_time_info) || + (runtime->audio_tstamp_report.actual_type == + SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { + + /* + * provide audio timestamp derived from pointer position + * add delay only if requested + */ + + audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr; + + if (runtime->audio_tstamp_config.report_delay) { + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + audio_frames -= runtime->delay; + else + audio_frames += runtime->delay; + } + audio_nsecs = div_u64(audio_frames * 1000000000LL, + runtime->rate); + *audio_tstamp = ns_to_timespec(audio_nsecs); + } + runtime->status->audio_tstamp = *audio_tstamp; + runtime->status->tstamp = *curr_tstamp; + + /* + * re-take a driver timestamp to let apps detect if the reference tstamp + * read by low-level hardware was provided with a delay + */ + snd_pcm_gettime(substream->runtime, (struct timespec *)&driver_tstamp); + runtime->driver_tstamp = driver_tstamp; +} + static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, unsigned int in_interrupt) { @@ -256,11 +299,18 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, pos = substream->ops->pointer(substream); curr_jiffies = jiffies; if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { - snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); - - if ((runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) && - (substream->ops->wall_clock)) - substream->ops->wall_clock(substream, &audio_tstamp); + if ((substream->ops->get_time_info) && + (runtime->audio_tstamp_config.type_requested != SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { + substream->ops->get_time_info(substream, &curr_tstamp, + &audio_tstamp, + &runtime->audio_tstamp_config, + &runtime->audio_tstamp_report); + + /* re-test in case tstamp type is not supported in hardware and was demoted to DEFAULT */ + if (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT) + snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); + } else + snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); } if (pos == SNDRV_PCM_POS_XRUN) { @@ -403,8 +453,10 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, } no_delta_check: - if (runtime->status->hw_ptr == new_hw_ptr) + if (runtime->status->hw_ptr == new_hw_ptr) { + update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); return 0; + } if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && runtime->silence_size > 0) @@ -426,30 +478,8 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, snd_BUG_ON(crossed_boundary != 1); runtime->hw_ptr_wrap += runtime->boundary; } - if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { - runtime->status->tstamp = curr_tstamp; - if (!(runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)) { - /* - * no wall clock available, provide audio timestamp - * derived from pointer position+delay - */ - u64 audio_frames, audio_nsecs; - - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) - audio_frames = runtime->hw_ptr_wrap - + runtime->status->hw_ptr - - runtime->delay; - else - audio_frames = runtime->hw_ptr_wrap - + runtime->status->hw_ptr - + runtime->delay; - audio_nsecs = div_u64(audio_frames * 1000000000LL, - runtime->rate); - audio_tstamp = ns_to_timespec(audio_nsecs); - } - runtime->status->audio_tstamp = audio_tstamp; - } + update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); return snd_pcm_update_state(substream, runtime); } diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 279e24f61305..d126c03361ae 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -25,7 +25,6 @@ #include <linux/slab.h> #include <linux/time.h> #include <linux/pm_qos.h> -#include <linux/aio.h> #include <linux/io.h> #include <linux/dma-mapping.h> #include <sound/core.h> @@ -35,6 +34,7 @@ #include <sound/pcm_params.h> #include <sound/timer.h> #include <sound/minors.h> +#include <linux/uio.h> /* * Compatibility @@ -707,6 +707,23 @@ int snd_pcm_status(struct snd_pcm_substream *substream, struct snd_pcm_runtime *runtime = substream->runtime; snd_pcm_stream_lock_irq(substream); + + snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data, + &runtime->audio_tstamp_config); + + /* backwards compatible behavior */ + if (runtime->audio_tstamp_config.type_requested == + SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) { + if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) + runtime->audio_tstamp_config.type_requested = + SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK; + else + runtime->audio_tstamp_config.type_requested = + SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT; + runtime->audio_tstamp_report.valid = 0; + } else + runtime->audio_tstamp_report.valid = 1; + status->state = runtime->status->state; status->suspended_state = runtime->status->suspended_state; if (status->state == SNDRV_PCM_STATE_OPEN) @@ -716,8 +733,15 @@ int snd_pcm_status(struct snd_pcm_substream *substream, snd_pcm_update_hw_ptr(substream); if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { status->tstamp = runtime->status->tstamp; + status->driver_tstamp = runtime->driver_tstamp; status->audio_tstamp = runtime->status->audio_tstamp; + if (runtime->audio_tstamp_report.valid == 1) + /* backwards compatibility, no report provided in COMPAT mode */ + snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data, + &status->audio_tstamp_accuracy, + &runtime->audio_tstamp_report); + goto _tstamp_end; } } else { @@ -753,12 +777,21 @@ int snd_pcm_status(struct snd_pcm_substream *substream, } static int snd_pcm_status_user(struct snd_pcm_substream *substream, - struct snd_pcm_status __user * _status) + struct snd_pcm_status __user * _status, + bool ext) { struct snd_pcm_status status; int res; - + memset(&status, 0, sizeof(status)); + /* + * with extension, parameters are read/write, + * get audio_tstamp_data from user, + * ignore rest of status structure + */ + if (ext && get_user(status.audio_tstamp_data, + (u32 __user *)(&_status->audio_tstamp_data))) + return -EFAULT; res = snd_pcm_status(substream, &status); if (res < 0) return res; @@ -2725,7 +2758,9 @@ static int snd_pcm_common_ioctl1(struct file *file, case SNDRV_PCM_IOCTL_SW_PARAMS: return snd_pcm_sw_params_user(substream, arg); case SNDRV_PCM_IOCTL_STATUS: - return snd_pcm_status_user(substream, arg); + return snd_pcm_status_user(substream, arg, false); + case SNDRV_PCM_IOCTL_STATUS_EXT: + return snd_pcm_status_user(substream, arg, true); case SNDRV_PCM_IOCTL_CHANNEL_INFO: return snd_pcm_channel_info_user(substream, arg); case SNDRV_PCM_IOCTL_PREPARE: @@ -3033,9 +3068,7 @@ static ssize_t snd_pcm_write(struct file *file, const char __user *buf, return result; } -static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) - +static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to) { struct snd_pcm_file *pcm_file; struct snd_pcm_substream *substream; @@ -3052,16 +3085,18 @@ static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, runtime = substream->runtime; if (runtime->status->state == SNDRV_PCM_STATE_OPEN) return -EBADFD; - if (nr_segs > 1024 || nr_segs != runtime->channels) + if (!iter_is_iovec(to)) + return -EINVAL; + if (to->nr_segs > 1024 || to->nr_segs != runtime->channels) return -EINVAL; - if (!frame_aligned(runtime, iov->iov_len)) + if (!frame_aligned(runtime, to->iov->iov_len)) return -EINVAL; - frames = bytes_to_samples(runtime, iov->iov_len); - bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); + frames = bytes_to_samples(runtime, to->iov->iov_len); + bufs = kmalloc(sizeof(void *) * to->nr_segs, GFP_KERNEL); if (bufs == NULL) return -ENOMEM; - for (i = 0; i < nr_segs; ++i) - bufs[i] = iov[i].iov_base; + for (i = 0; i < to->nr_segs; ++i) + bufs[i] = to->iov[i].iov_base; result = snd_pcm_lib_readv(substream, bufs, frames); if (result > 0) result = frames_to_bytes(runtime, result); @@ -3069,8 +3104,7 @@ static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, return result; } -static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from) { struct snd_pcm_file *pcm_file; struct snd_pcm_substream *substream; @@ -3087,15 +3121,17 @@ static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, runtime = substream->runtime; if (runtime->status->state == SNDRV_PCM_STATE_OPEN) return -EBADFD; - if (nr_segs > 128 || nr_segs != runtime->channels || - !frame_aligned(runtime, iov->iov_len)) + if (!iter_is_iovec(from)) + return -EINVAL; + if (from->nr_segs > 128 || from->nr_segs != runtime->channels || + !frame_aligned(runtime, from->iov->iov_len)) return -EINVAL; - frames = bytes_to_samples(runtime, iov->iov_len); - bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); + frames = bytes_to_samples(runtime, from->iov->iov_len); + bufs = kmalloc(sizeof(void *) * from->nr_segs, GFP_KERNEL); if (bufs == NULL) return -ENOMEM; - for (i = 0; i < nr_segs; ++i) - bufs[i] = iov[i].iov_base; + for (i = 0; i < from->nr_segs; ++i) + bufs[i] = from->iov[i].iov_base; result = snd_pcm_lib_writev(substream, bufs, frames); if (result > 0) result = frames_to_bytes(runtime, result); @@ -3633,7 +3669,7 @@ const struct file_operations snd_pcm_f_ops[2] = { { .owner = THIS_MODULE, .write = snd_pcm_write, - .aio_write = snd_pcm_aio_write, + .write_iter = snd_pcm_writev, .open = snd_pcm_playback_open, .release = snd_pcm_release, .llseek = no_llseek, @@ -3647,7 +3683,7 @@ const struct file_operations snd_pcm_f_ops[2] = { { .owner = THIS_MODULE, .read = snd_pcm_read, - .aio_read = snd_pcm_aio_read, + .read_iter = snd_pcm_readv, .open = snd_pcm_capture_open, .release = snd_pcm_release, .llseek = no_llseek, diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index b5a748596fc4..a7759846fbaa 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -1429,10 +1429,8 @@ static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, for (idx = 0; idx < count; idx++) { substream = kzalloc(sizeof(*substream), GFP_KERNEL); - if (substream == NULL) { - rmidi_err(rmidi, "rawmidi: cannot allocate substream\n"); + if (!substream) return -ENOMEM; - } substream->stream = direction; substream->number = idx; substream->rmidi = rmidi; @@ -1479,10 +1477,8 @@ int snd_rawmidi_new(struct snd_card *card, char *id, int device, if (rrawmidi) *rrawmidi = NULL; rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); - if (rmidi == NULL) { - dev_err(card->dev, "rawmidi: cannot allocate\n"); + if (!rmidi) return -ENOMEM; - } rmidi->card = card; rmidi->device = device; mutex_init(&rmidi->open_mutex); diff --git a/sound/core/seq/oss/seq_oss.c b/sound/core/seq/oss/seq_oss.c index 16d42679e43f..72873a46afeb 100644 --- a/sound/core/seq/oss/seq_oss.c +++ b/sound/core/seq/oss/seq_oss.c @@ -65,15 +65,20 @@ static unsigned int odev_poll(struct file *file, poll_table * wait); * module interface */ +static struct snd_seq_driver seq_oss_synth_driver = { + .driver = { + .name = KBUILD_MODNAME, + .probe = snd_seq_oss_synth_probe, + .remove = snd_seq_oss_synth_remove, + }, + .id = SNDRV_SEQ_DEV_ID_OSS, + .argsize = sizeof(struct snd_seq_oss_reg), +}; + static int __init alsa_seq_oss_init(void) { int rc; - static struct snd_seq_dev_ops ops = { - snd_seq_oss_synth_register, - snd_seq_oss_synth_unregister, - }; - snd_seq_autoload_lock(); if ((rc = register_device()) < 0) goto error; if ((rc = register_proc()) < 0) { @@ -86,8 +91,8 @@ static int __init alsa_seq_oss_init(void) goto error; } - if ((rc = snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OSS, &ops, - sizeof(struct snd_seq_oss_reg))) < 0) { + rc = snd_seq_driver_register(&seq_oss_synth_driver); + if (rc < 0) { snd_seq_oss_delete_client(); unregister_proc(); unregister_device(); @@ -98,13 +103,12 @@ static int __init alsa_seq_oss_init(void) snd_seq_oss_synth_init(); error: - snd_seq_autoload_unlock(); return rc; } static void __exit alsa_seq_oss_exit(void) { - snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OSS); + snd_seq_driver_unregister(&seq_oss_synth_driver); snd_seq_oss_delete_client(); unregister_proc(); unregister_device(); diff --git a/sound/core/seq/oss/seq_oss_init.c b/sound/core/seq/oss/seq_oss_init.c index b0e32e161dd1..2de3feff70d0 100644 --- a/sound/core/seq/oss/seq_oss_init.c +++ b/sound/core/seq/oss/seq_oss_init.c @@ -188,10 +188,8 @@ snd_seq_oss_open(struct file *file, int level) struct seq_oss_devinfo *dp; dp = kzalloc(sizeof(*dp), GFP_KERNEL); - if (!dp) { - pr_err("ALSA: seq_oss: can't malloc device info\n"); + if (!dp) return -ENOMEM; - } dp->cseq = system_client; dp->port = -1; diff --git a/sound/core/seq/oss/seq_oss_midi.c b/sound/core/seq/oss/seq_oss_midi.c index e79cc44b1394..96e8395ae586 100644 --- a/sound/core/seq/oss/seq_oss_midi.c +++ b/sound/core/seq/oss/seq_oss_midi.c @@ -173,10 +173,9 @@ snd_seq_oss_midi_check_new_port(struct snd_seq_port_info *pinfo) /* * allocate midi info record */ - if ((mdev = kzalloc(sizeof(*mdev), GFP_KERNEL)) == NULL) { - pr_err("ALSA: seq_oss: can't malloc midi info\n"); + mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); + if (!mdev) return -ENOMEM; - } /* copy the port information */ mdev->client = pinfo->addr.client; diff --git a/sound/core/seq/oss/seq_oss_readq.c b/sound/core/seq/oss/seq_oss_readq.c index 654d17a5023c..c080c73cea04 100644 --- a/sound/core/seq/oss/seq_oss_readq.c +++ b/sound/core/seq/oss/seq_oss_readq.c @@ -47,13 +47,12 @@ snd_seq_oss_readq_new(struct seq_oss_devinfo *dp, int maxlen) { struct seq_oss_readq *q; - if ((q = kzalloc(sizeof(*q), GFP_KERNEL)) == NULL) { - pr_err("ALSA: seq_oss: can't malloc read queue\n"); + q = kzalloc(sizeof(*q), GFP_KERNEL); + if (!q) return NULL; - } - if ((q->q = kcalloc(maxlen, sizeof(union evrec), GFP_KERNEL)) == NULL) { - pr_err("ALSA: seq_oss: can't malloc read queue buffer\n"); + q->q = kcalloc(maxlen, sizeof(union evrec), GFP_KERNEL); + if (!q->q) { kfree(q); return NULL; } diff --git a/sound/core/seq/oss/seq_oss_synth.c b/sound/core/seq/oss/seq_oss_synth.c index 701feb71b700..48e4fe1b68ab 100644 --- a/sound/core/seq/oss/seq_oss_synth.c +++ b/sound/core/seq/oss/seq_oss_synth.c @@ -98,17 +98,17 @@ snd_seq_oss_synth_init(void) * registration of the synth device */ int -snd_seq_oss_synth_register(struct snd_seq_device *dev) +snd_seq_oss_synth_probe(struct device *_dev) { + struct snd_seq_device *dev = to_seq_dev(_dev); int i; struct seq_oss_synth *rec; struct snd_seq_oss_reg *reg = SNDRV_SEQ_DEVICE_ARGPTR(dev); unsigned long flags; - if ((rec = kzalloc(sizeof(*rec), GFP_KERNEL)) == NULL) { - pr_err("ALSA: seq_oss: can't malloc synth info\n"); + rec = kzalloc(sizeof(*rec), GFP_KERNEL); + if (!rec) return -ENOMEM; - } rec->seq_device = -1; rec->synth_type = reg->type; rec->synth_subtype = reg->subtype; @@ -149,8 +149,9 @@ snd_seq_oss_synth_register(struct snd_seq_device *dev) int -snd_seq_oss_synth_unregister(struct snd_seq_device *dev) +snd_seq_oss_synth_remove(struct device *_dev) { + struct snd_seq_device *dev = to_seq_dev(_dev); int index; struct seq_oss_synth *rec = dev->driver_data; unsigned long flags; @@ -247,7 +248,6 @@ snd_seq_oss_synth_setup(struct seq_oss_devinfo *dp) if (info->nr_voices > 0) { info->ch = kcalloc(info->nr_voices, sizeof(struct seq_oss_chinfo), GFP_KERNEL); if (!info->ch) { - pr_err("ALSA: seq_oss: Cannot malloc voices\n"); rec->oper.close(&info->arg); module_put(rec->oper.owner); snd_use_lock_free(&rec->use_lock); diff --git a/sound/core/seq/oss/seq_oss_synth.h b/sound/core/seq/oss/seq_oss_synth.h index dbdfcbb80eaa..74ac55f166b6 100644 --- a/sound/core/seq/oss/seq_oss_synth.h +++ b/sound/core/seq/oss/seq_oss_synth.h @@ -28,8 +28,8 @@ #include <sound/seq_device.h> void snd_seq_oss_synth_init(void); -int snd_seq_oss_synth_register(struct snd_seq_device *dev); -int snd_seq_oss_synth_unregister(struct snd_seq_device *dev); +int snd_seq_oss_synth_probe(struct device *dev); +int snd_seq_oss_synth_remove(struct device *dev); void snd_seq_oss_synth_setup(struct seq_oss_devinfo *dp); void snd_seq_oss_synth_setup_midi(struct seq_oss_devinfo *dp); void snd_seq_oss_synth_cleanup(struct seq_oss_devinfo *dp); diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index 48287651ac77..edbdab85fc02 100644 --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -1879,6 +1879,7 @@ static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client, if (cptr == NULL) return -ENOENT; memset(&info, 0, sizeof(info)); + info.client = cptr->number; info.output_pool = cptr->pool->size; info.output_room = cptr->pool->room; info.output_free = info.output_pool; diff --git a/sound/core/seq/seq_device.c b/sound/core/seq/seq_device.c index 0631bdadd12b..d99f99d61983 100644 --- a/sound/core/seq/seq_device.c +++ b/sound/core/seq/seq_device.c @@ -36,6 +36,7 @@ * */ +#include <linux/device.h> #include <linux/init.h> #include <linux/module.h> #include <sound/core.h> @@ -51,140 +52,78 @@ MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>"); MODULE_DESCRIPTION("ALSA sequencer device management"); MODULE_LICENSE("GPL"); -/* driver state */ -#define DRIVER_EMPTY 0 -#define DRIVER_LOADED (1<<0) -#define DRIVER_REQUESTED (1<<1) -#define DRIVER_LOCKED (1<<2) -#define DRIVER_REQUESTING (1<<3) - -struct ops_list { - char id[ID_LEN]; /* driver id */ - int driver; /* driver state */ - int used; /* reference counter */ - int argsize; /* argument size */ - - /* operators */ - struct snd_seq_dev_ops ops; - - /* registered devices */ - struct list_head dev_list; /* list of devices */ - int num_devices; /* number of associated devices */ - int num_init_devices; /* number of initialized devices */ - struct mutex reg_mutex; - - struct list_head list; /* next driver */ -}; +/* + * bus definition + */ +static int snd_seq_bus_match(struct device *dev, struct device_driver *drv) +{ + struct snd_seq_device *sdev = to_seq_dev(dev); + struct snd_seq_driver *sdrv = to_seq_drv(drv); + return strcmp(sdrv->id, sdev->id) == 0 && + sdrv->argsize == sdev->argsize; +} -static LIST_HEAD(opslist); -static int num_ops; -static DEFINE_MUTEX(ops_mutex); -#ifdef CONFIG_PROC_FS -static struct snd_info_entry *info_entry; -#endif +static struct bus_type snd_seq_bus_type = { + .name = "snd_seq", + .match = snd_seq_bus_match, +}; /* - * prototypes + * proc interface -- just for compatibility */ -static int snd_seq_device_free(struct snd_seq_device *dev); -static int snd_seq_device_dev_free(struct snd_device *device); -static int snd_seq_device_dev_register(struct snd_device *device); -static int snd_seq_device_dev_disconnect(struct snd_device *device); - -static int init_device(struct snd_seq_device *dev, struct ops_list *ops); -static int free_device(struct snd_seq_device *dev, struct ops_list *ops); -static struct ops_list *find_driver(char *id, int create_if_empty); -static struct ops_list *create_driver(char *id); -static void unlock_driver(struct ops_list *ops); -static void remove_drivers(void); +#ifdef CONFIG_PROC_FS +static struct snd_info_entry *info_entry; -/* - * show all drivers and their status - */ +static int print_dev_info(struct device *dev, void *data) +{ + struct snd_seq_device *sdev = to_seq_dev(dev); + struct snd_info_buffer *buffer = data; + + snd_iprintf(buffer, "snd-%s,%s,%d\n", sdev->id, + dev->driver ? "loaded" : "empty", + dev->driver ? 1 : 0); + return 0; +} -#ifdef CONFIG_PROC_FS static void snd_seq_device_info(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { - struct ops_list *ops; - - mutex_lock(&ops_mutex); - list_for_each_entry(ops, &opslist, list) { - snd_iprintf(buffer, "snd-%s%s%s%s,%d\n", - ops->id, - ops->driver & DRIVER_LOADED ? ",loaded" : (ops->driver == DRIVER_EMPTY ? ",empty" : ""), - ops->driver & DRIVER_REQUESTED ? ",requested" : "", - ops->driver & DRIVER_LOCKED ? ",locked" : "", - ops->num_devices); - } - mutex_unlock(&ops_mutex); + bus_for_each_dev(&snd_seq_bus_type, NULL, buffer, print_dev_info); } #endif - + /* * load all registered drivers (called from seq_clientmgr.c) */ #ifdef CONFIG_MODULES -/* avoid auto-loading during module_init() */ +/* flag to block auto-loading */ static atomic_t snd_seq_in_init = ATOMIC_INIT(1); /* blocked as default */ -void snd_seq_autoload_lock(void) -{ - atomic_inc(&snd_seq_in_init); -} -void snd_seq_autoload_unlock(void) +static int request_seq_drv(struct device *dev, void *data) { - atomic_dec(&snd_seq_in_init); + struct snd_seq_device *sdev = to_seq_dev(dev); + + if (!dev->driver) + request_module("snd-%s", sdev->id); + return 0; } -static void autoload_drivers(void) +static void autoload_drivers(struct work_struct *work) { /* avoid reentrance */ - if (atomic_inc_return(&snd_seq_in_init) == 1) { - struct ops_list *ops; - - mutex_lock(&ops_mutex); - list_for_each_entry(ops, &opslist, list) { - if ((ops->driver & DRIVER_REQUESTING) && - !(ops->driver & DRIVER_REQUESTED)) { - ops->used++; - mutex_unlock(&ops_mutex); - ops->driver |= DRIVER_REQUESTED; - request_module("snd-%s", ops->id); - mutex_lock(&ops_mutex); - ops->used--; - } - } - mutex_unlock(&ops_mutex); - } + if (atomic_inc_return(&snd_seq_in_init) == 1) + bus_for_each_dev(&snd_seq_bus_type, NULL, NULL, + request_seq_drv); atomic_dec(&snd_seq_in_init); } -static void call_autoload(struct work_struct *work) -{ - autoload_drivers(); -} - -static DECLARE_WORK(autoload_work, call_autoload); - -static void try_autoload(struct ops_list *ops) -{ - if (!ops->driver) { - ops->driver |= DRIVER_REQUESTING; - schedule_work(&autoload_work); - } -} +static DECLARE_WORK(autoload_work, autoload_drivers); static void queue_autoload_drivers(void) { - struct ops_list *ops; - - mutex_lock(&ops_mutex); - list_for_each_entry(ops, &opslist, list) - try_autoload(ops); - mutex_unlock(&ops_mutex); + schedule_work(&autoload_work); } void snd_seq_autoload_init(void) @@ -195,384 +134,143 @@ void snd_seq_autoload_init(void) queue_autoload_drivers(); #endif } -#else -#define try_autoload(ops) /* NOP */ -#endif +EXPORT_SYMBOL(snd_seq_autoload_init); -void snd_seq_device_load_drivers(void) +void snd_seq_autoload_exit(void) { -#ifdef CONFIG_MODULES - queue_autoload_drivers(); - flush_work(&autoload_work); -#endif + atomic_inc(&snd_seq_in_init); } +EXPORT_SYMBOL(snd_seq_autoload_exit); -/* - * register a sequencer device - * card = card info - * device = device number (if any) - * id = id of driver - * result = return pointer (NULL allowed if unnecessary) - */ -int snd_seq_device_new(struct snd_card *card, int device, char *id, int argsize, - struct snd_seq_device **result) +void snd_seq_device_load_drivers(void) { - struct snd_seq_device *dev; - struct ops_list *ops; - int err; - static struct snd_device_ops dops = { - .dev_free = snd_seq_device_dev_free, - .dev_register = snd_seq_device_dev_register, - .dev_disconnect = snd_seq_device_dev_disconnect, - }; - - if (result) - *result = NULL; - - if (snd_BUG_ON(!id)) - return -EINVAL; - - ops = find_driver(id, 1); - if (ops == NULL) - return -ENOMEM; - - dev = kzalloc(sizeof(*dev)*2 + argsize, GFP_KERNEL); - if (dev == NULL) { - unlock_driver(ops); - return -ENOMEM; - } - - /* set up device info */ - dev->card = card; - dev->device = device; - strlcpy(dev->id, id, sizeof(dev->id)); - dev->argsize = argsize; - dev->status = SNDRV_SEQ_DEVICE_FREE; - - /* add this device to the list */ - mutex_lock(&ops->reg_mutex); - list_add_tail(&dev->list, &ops->dev_list); - ops->num_devices++; - mutex_unlock(&ops->reg_mutex); - - if ((err = snd_device_new(card, SNDRV_DEV_SEQUENCER, dev, &dops)) < 0) { - snd_seq_device_free(dev); - return err; - } - - try_autoload(ops); - unlock_driver(ops); - - if (result) - *result = dev; - - return 0; + queue_autoload_drivers(); + flush_work(&autoload_work); } +EXPORT_SYMBOL(snd_seq_device_load_drivers); +#else +#define queue_autoload_drivers() /* NOP */ +#endif /* - * free the existing device + * device management */ -static int snd_seq_device_free(struct snd_seq_device *dev) -{ - struct ops_list *ops; - - if (snd_BUG_ON(!dev)) - return -EINVAL; - - ops = find_driver(dev->id, 0); - if (ops == NULL) - return -ENXIO; - - /* remove the device from the list */ - mutex_lock(&ops->reg_mutex); - list_del(&dev->list); - ops->num_devices--; - mutex_unlock(&ops->reg_mutex); - - free_device(dev, ops); - if (dev->private_free) - dev->private_free(dev); - kfree(dev); - - unlock_driver(ops); - - return 0; -} - static int snd_seq_device_dev_free(struct snd_device *device) { struct snd_seq_device *dev = device->device_data; - return snd_seq_device_free(dev); + + put_device(&dev->dev); + return 0; } -/* - * register the device - */ static int snd_seq_device_dev_register(struct snd_device *device) { struct snd_seq_device *dev = device->device_data; - struct ops_list *ops; - - ops = find_driver(dev->id, 0); - if (ops == NULL) - return -ENOENT; - - /* initialize this device if the corresponding driver was - * already loaded - */ - if (ops->driver & DRIVER_LOADED) - init_device(dev, ops); + int err; - unlock_driver(ops); + err = device_add(&dev->dev); + if (err < 0) + return err; + if (!dev->dev.driver) + queue_autoload_drivers(); return 0; } -/* - * disconnect the device - */ static int snd_seq_device_dev_disconnect(struct snd_device *device) { struct snd_seq_device *dev = device->device_data; - struct ops_list *ops; - - ops = find_driver(dev->id, 0); - if (ops == NULL) - return -ENOENT; - - free_device(dev, ops); - unlock_driver(ops); + device_del(&dev->dev); return 0; } -/* - * register device driver - * id = driver id - * entry = driver operators - duplicated to each instance - */ -int snd_seq_device_register_driver(char *id, struct snd_seq_dev_ops *entry, - int argsize) +static void snd_seq_dev_release(struct device *dev) { - struct ops_list *ops; - struct snd_seq_device *dev; + struct snd_seq_device *sdev = to_seq_dev(dev); - if (id == NULL || entry == NULL || - entry->init_device == NULL || entry->free_device == NULL) - return -EINVAL; - - ops = find_driver(id, 1); - if (ops == NULL) - return -ENOMEM; - if (ops->driver & DRIVER_LOADED) { - pr_warn("ALSA: seq: driver_register: driver '%s' already exists\n", id); - unlock_driver(ops); - return -EBUSY; - } - - mutex_lock(&ops->reg_mutex); - /* copy driver operators */ - ops->ops = *entry; - ops->driver |= DRIVER_LOADED; - ops->argsize = argsize; - - /* initialize existing devices if necessary */ - list_for_each_entry(dev, &ops->dev_list, list) { - init_device(dev, ops); - } - mutex_unlock(&ops->reg_mutex); - - unlock_driver(ops); - - return 0; + if (sdev->private_free) + sdev->private_free(sdev); + kfree(sdev); } - -/* - * create driver record - */ -static struct ops_list * create_driver(char *id) -{ - struct ops_list *ops; - - ops = kzalloc(sizeof(*ops), GFP_KERNEL); - if (ops == NULL) - return ops; - - /* set up driver entry */ - strlcpy(ops->id, id, sizeof(ops->id)); - mutex_init(&ops->reg_mutex); - /* - * The ->reg_mutex locking rules are per-driver, so we create - * separate per-driver lock classes: - */ - lockdep_set_class(&ops->reg_mutex, (struct lock_class_key *)id); - - ops->driver = DRIVER_EMPTY; - INIT_LIST_HEAD(&ops->dev_list); - /* lock this instance */ - ops->used = 1; - - /* register driver entry */ - mutex_lock(&ops_mutex); - list_add_tail(&ops->list, &opslist); - num_ops++; - mutex_unlock(&ops_mutex); - - return ops; -} - - /* - * unregister the specified driver + * register a sequencer device + * card = card info + * device = device number (if any) + * id = id of driver + * result = return pointer (NULL allowed if unnecessary) */ -int snd_seq_device_unregister_driver(char *id) +int snd_seq_device_new(struct snd_card *card, int device, const char *id, + int argsize, struct snd_seq_device **result) { - struct ops_list *ops; struct snd_seq_device *dev; + int err; + static struct snd_device_ops dops = { + .dev_free = snd_seq_device_dev_free, + .dev_register = snd_seq_device_dev_register, + .dev_disconnect = snd_seq_device_dev_disconnect, + }; - ops = find_driver(id, 0); - if (ops == NULL) - return -ENXIO; - if (! (ops->driver & DRIVER_LOADED) || - (ops->driver & DRIVER_LOCKED)) { - pr_err("ALSA: seq: driver_unregister: cannot unload driver '%s': status=%x\n", - id, ops->driver); - unlock_driver(ops); - return -EBUSY; - } - - /* close and release all devices associated with this driver */ - mutex_lock(&ops->reg_mutex); - ops->driver |= DRIVER_LOCKED; /* do not remove this driver recursively */ - list_for_each_entry(dev, &ops->dev_list, list) { - free_device(dev, ops); - } - - ops->driver = 0; - if (ops->num_init_devices > 0) - pr_err("ALSA: seq: free_driver: init_devices > 0!! (%d)\n", - ops->num_init_devices); - mutex_unlock(&ops->reg_mutex); - - unlock_driver(ops); + if (result) + *result = NULL; - /* remove empty driver entries */ - remove_drivers(); + if (snd_BUG_ON(!id)) + return -EINVAL; - return 0; -} + dev = kzalloc(sizeof(*dev) + argsize, GFP_KERNEL); + if (!dev) + return -ENOMEM; + /* set up device info */ + dev->card = card; + dev->device = device; + dev->id = id; + dev->argsize = argsize; -/* - * remove empty driver entries - */ -static void remove_drivers(void) -{ - struct list_head *head; - - mutex_lock(&ops_mutex); - head = opslist.next; - while (head != &opslist) { - struct ops_list *ops = list_entry(head, struct ops_list, list); - if (! (ops->driver & DRIVER_LOADED) && - ops->used == 0 && ops->num_devices == 0) { - head = head->next; - list_del(&ops->list); - kfree(ops); - num_ops--; - } else - head = head->next; - } - mutex_unlock(&ops_mutex); -} + device_initialize(&dev->dev); + dev->dev.parent = &card->card_dev; + dev->dev.bus = &snd_seq_bus_type; + dev->dev.release = snd_seq_dev_release; + dev_set_name(&dev->dev, "%s-%d-%d", dev->id, card->number, device); -/* - * initialize the device - call init_device operator - */ -static int init_device(struct snd_seq_device *dev, struct ops_list *ops) -{ - if (! (ops->driver & DRIVER_LOADED)) - return 0; /* driver is not loaded yet */ - if (dev->status != SNDRV_SEQ_DEVICE_FREE) - return 0; /* already initialized */ - if (ops->argsize != dev->argsize) { - pr_err("ALSA: seq: incompatible device '%s' for plug-in '%s' (%d %d)\n", - dev->name, ops->id, ops->argsize, dev->argsize); - return -EINVAL; - } - if (ops->ops.init_device(dev) >= 0) { - dev->status = SNDRV_SEQ_DEVICE_REGISTERED; - ops->num_init_devices++; - } else { - pr_err("ALSA: seq: init_device failed: %s: %s\n", - dev->name, dev->id); + /* add this device to the list */ + err = snd_device_new(card, SNDRV_DEV_SEQUENCER, dev, &dops); + if (err < 0) { + put_device(&dev->dev); + return err; } + + if (result) + *result = dev; return 0; } +EXPORT_SYMBOL(snd_seq_device_new); /* - * release the device - call free_device operator + * driver registration */ -static int free_device(struct snd_seq_device *dev, struct ops_list *ops) +int __snd_seq_driver_register(struct snd_seq_driver *drv, struct module *mod) { - int result; - - if (! (ops->driver & DRIVER_LOADED)) - return 0; /* driver is not loaded yet */ - if (dev->status != SNDRV_SEQ_DEVICE_REGISTERED) - return 0; /* not registered */ - if (ops->argsize != dev->argsize) { - pr_err("ALSA: seq: incompatible device '%s' for plug-in '%s' (%d %d)\n", - dev->name, ops->id, ops->argsize, dev->argsize); + if (WARN_ON(!drv->driver.name || !drv->id)) return -EINVAL; - } - if ((result = ops->ops.free_device(dev)) >= 0 || result == -ENXIO) { - dev->status = SNDRV_SEQ_DEVICE_FREE; - dev->driver_data = NULL; - ops->num_init_devices--; - } else { - pr_err("ALSA: seq: free_device failed: %s: %s\n", - dev->name, dev->id); - } - - return 0; + drv->driver.bus = &snd_seq_bus_type; + drv->driver.owner = mod; + return driver_register(&drv->driver); } +EXPORT_SYMBOL_GPL(__snd_seq_driver_register); -/* - * find the matching driver with given id - */ -static struct ops_list * find_driver(char *id, int create_if_empty) +void snd_seq_driver_unregister(struct snd_seq_driver *drv) { - struct ops_list *ops; - - mutex_lock(&ops_mutex); - list_for_each_entry(ops, &opslist, list) { - if (strcmp(ops->id, id) == 0) { - ops->used++; - mutex_unlock(&ops_mutex); - return ops; - } - } - mutex_unlock(&ops_mutex); - if (create_if_empty) - return create_driver(id); - return NULL; + driver_unregister(&drv->driver); } - -static void unlock_driver(struct ops_list *ops) -{ - mutex_lock(&ops_mutex); - ops->used--; - mutex_unlock(&ops_mutex); -} - +EXPORT_SYMBOL_GPL(snd_seq_driver_unregister); /* * module part */ -static int __init alsa_seq_device_init(void) +static int __init seq_dev_proc_init(void) { #ifdef CONFIG_PROC_FS info_entry = snd_info_create_module_entry(THIS_MODULE, "drivers", @@ -589,28 +287,29 @@ static int __init alsa_seq_device_init(void) return 0; } +static int __init alsa_seq_device_init(void) +{ + int err; + + err = bus_register(&snd_seq_bus_type); + if (err < 0) + return err; + err = seq_dev_proc_init(); + if (err < 0) + bus_unregister(&snd_seq_bus_type); + return err; +} + static void __exit alsa_seq_device_exit(void) { #ifdef CONFIG_MODULES cancel_work_sync(&autoload_work); #endif - remove_drivers(); #ifdef CONFIG_PROC_FS snd_info_free_entry(info_entry); #endif - if (num_ops) - pr_err("ALSA: seq: drivers not released (%d)\n", num_ops); + bus_unregister(&snd_seq_bus_type); } -module_init(alsa_seq_device_init) +subsys_initcall(alsa_seq_device_init) module_exit(alsa_seq_device_exit) - -EXPORT_SYMBOL(snd_seq_device_load_drivers); -EXPORT_SYMBOL(snd_seq_device_new); -EXPORT_SYMBOL(snd_seq_device_register_driver); -EXPORT_SYMBOL(snd_seq_device_unregister_driver); -#ifdef CONFIG_MODULES -EXPORT_SYMBOL(snd_seq_autoload_init); -EXPORT_SYMBOL(snd_seq_autoload_lock); -EXPORT_SYMBOL(snd_seq_autoload_unlock); -#endif diff --git a/sound/core/seq/seq_dummy.c b/sound/core/seq/seq_dummy.c index 5d905d90d504..d3a2ec4f0561 100644 --- a/sound/core/seq/seq_dummy.c +++ b/sound/core/seq/seq_dummy.c @@ -214,11 +214,7 @@ delete_client(void) static int __init alsa_seq_dummy_init(void) { - int err; - snd_seq_autoload_lock(); - err = register_client(); - snd_seq_autoload_unlock(); - return err; + return register_client(); } static void __exit alsa_seq_dummy_exit(void) diff --git a/sound/core/seq/seq_fifo.c b/sound/core/seq/seq_fifo.c index 53a403e17c5b..1d5acbe0c08b 100644 --- a/sound/core/seq/seq_fifo.c +++ b/sound/core/seq/seq_fifo.c @@ -33,10 +33,8 @@ struct snd_seq_fifo *snd_seq_fifo_new(int poolsize) struct snd_seq_fifo *f; f = kzalloc(sizeof(*f), GFP_KERNEL); - if (f == NULL) { - pr_debug("ALSA: seq: malloc failed for snd_seq_fifo_new() \n"); + if (!f) return NULL; - } f->pool = snd_seq_pool_new(poolsize); if (f->pool == NULL) { diff --git a/sound/core/seq/seq_memory.c b/sound/core/seq/seq_memory.c index ba8e4a64e13e..801076687bb1 100644 --- a/sound/core/seq/seq_memory.c +++ b/sound/core/seq/seq_memory.c @@ -387,10 +387,8 @@ int snd_seq_pool_init(struct snd_seq_pool *pool) return 0; pool->ptr = vmalloc(sizeof(struct snd_seq_event_cell) * pool->size); - if (pool->ptr == NULL) { - pr_debug("ALSA: seq: malloc for sequencer events failed\n"); + if (!pool->ptr) return -ENOMEM; - } /* add new cells to the free cell list */ spin_lock_irqsave(&pool->lock, flags); @@ -463,10 +461,8 @@ struct snd_seq_pool *snd_seq_pool_new(int poolsize) /* create pool block */ pool = kzalloc(sizeof(*pool), GFP_KERNEL); - if (pool == NULL) { - pr_debug("ALSA: seq: malloc failed for pool\n"); + if (!pool) return NULL; - } spin_lock_init(&pool->lock); pool->ptr = NULL; pool->free = NULL; diff --git a/sound/core/seq/seq_midi.c b/sound/core/seq/seq_midi.c index 68fec776da26..5dd0ee258359 100644 --- a/sound/core/seq/seq_midi.c +++ b/sound/core/seq/seq_midi.c @@ -273,8 +273,9 @@ static void snd_seq_midisynth_delete(struct seq_midisynth *msynth) /* register new midi synth port */ static int -snd_seq_midisynth_register_port(struct snd_seq_device *dev) +snd_seq_midisynth_probe(struct device *_dev) { + struct snd_seq_device *dev = to_seq_dev(_dev); struct seq_midisynth_client *client; struct seq_midisynth *msynth, *ms; struct snd_seq_port_info *port; @@ -427,8 +428,9 @@ snd_seq_midisynth_register_port(struct snd_seq_device *dev) /* release midi synth port */ static int -snd_seq_midisynth_unregister_port(struct snd_seq_device *dev) +snd_seq_midisynth_remove(struct device *_dev) { + struct snd_seq_device *dev = to_seq_dev(_dev); struct seq_midisynth_client *client; struct seq_midisynth *msynth; struct snd_card *card = dev->card; @@ -457,24 +459,14 @@ snd_seq_midisynth_unregister_port(struct snd_seq_device *dev) return 0; } +static struct snd_seq_driver seq_midisynth_driver = { + .driver = { + .name = KBUILD_MODNAME, + .probe = snd_seq_midisynth_probe, + .remove = snd_seq_midisynth_remove, + }, + .id = SNDRV_SEQ_DEV_ID_MIDISYNTH, + .argsize = 0, +}; -static int __init alsa_seq_midi_init(void) -{ - static struct snd_seq_dev_ops ops = { - snd_seq_midisynth_register_port, - snd_seq_midisynth_unregister_port, - }; - memset(&synths, 0, sizeof(synths)); - snd_seq_autoload_lock(); - snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_MIDISYNTH, &ops, 0); - snd_seq_autoload_unlock(); - return 0; -} - -static void __exit alsa_seq_midi_exit(void) -{ - snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_MIDISYNTH); -} - -module_init(alsa_seq_midi_init) -module_exit(alsa_seq_midi_exit) +module_snd_seq_driver(seq_midisynth_driver); diff --git a/sound/core/seq/seq_ports.c b/sound/core/seq/seq_ports.c index 46ff593f618d..55170a20ae72 100644 --- a/sound/core/seq/seq_ports.c +++ b/sound/core/seq/seq_ports.c @@ -141,10 +141,8 @@ struct snd_seq_client_port *snd_seq_create_port(struct snd_seq_client *client, /* create a new port */ new_port = kzalloc(sizeof(*new_port), GFP_KERNEL); - if (! new_port) { - pr_debug("ALSA: seq: malloc failed for registering client port\n"); + if (!new_port) return NULL; /* failure, out of memory */ - } /* init port data */ new_port->addr.client = client->number; new_port->addr.port = -1; diff --git a/sound/core/seq/seq_prioq.c b/sound/core/seq/seq_prioq.c index 021b02bc9330..bc1c8488fc2a 100644 --- a/sound/core/seq/seq_prioq.c +++ b/sound/core/seq/seq_prioq.c @@ -59,10 +59,8 @@ struct snd_seq_prioq *snd_seq_prioq_new(void) struct snd_seq_prioq *f; f = kzalloc(sizeof(*f), GFP_KERNEL); - if (f == NULL) { - pr_debug("ALSA: seq: malloc failed for snd_seq_prioq_new()\n"); + if (!f) return NULL; - } spin_lock_init(&f->lock); f->head = NULL; diff --git a/sound/core/seq/seq_queue.c b/sound/core/seq/seq_queue.c index aad4878cee55..a0cda38205b9 100644 --- a/sound/core/seq/seq_queue.c +++ b/sound/core/seq/seq_queue.c @@ -111,10 +111,8 @@ static struct snd_seq_queue *queue_new(int owner, int locked) struct snd_seq_queue *q; q = kzalloc(sizeof(*q), GFP_KERNEL); - if (q == NULL) { - pr_debug("ALSA: seq: malloc failed for snd_seq_queue_new()\n"); + if (!q) return NULL; - } spin_lock_init(&q->owner_lock); spin_lock_init(&q->check_lock); diff --git a/sound/core/seq/seq_timer.c b/sound/core/seq/seq_timer.c index e73605393eee..186f1611103c 100644 --- a/sound/core/seq/seq_timer.c +++ b/sound/core/seq/seq_timer.c @@ -56,10 +56,8 @@ struct snd_seq_timer *snd_seq_timer_new(void) struct snd_seq_timer *tmr; tmr = kzalloc(sizeof(*tmr), GFP_KERNEL); - if (tmr == NULL) { - pr_debug("ALSA: seq: malloc failed for snd_seq_timer_new() \n"); + if (!tmr) return NULL; - } spin_lock_init(&tmr->lock); /* reset setup to defaults */ diff --git a/sound/core/sound.c b/sound/core/sound.c index 185cec01ee25..5fc93d00572a 100644 --- a/sound/core/sound.c +++ b/sound/core/sound.c @@ -186,7 +186,7 @@ static const struct file_operations snd_fops = }; #ifdef CONFIG_SND_DYNAMIC_MINORS -static int snd_find_free_minor(int type) +static int snd_find_free_minor(int type, struct snd_card *card, int dev) { int minor; @@ -209,7 +209,7 @@ static int snd_find_free_minor(int type) return -EBUSY; } #else -static int snd_kernel_minor(int type, struct snd_card *card, int dev) +static int snd_find_free_minor(int type, struct snd_card *card, int dev) { int minor; @@ -237,6 +237,8 @@ static int snd_kernel_minor(int type, struct snd_card *card, int dev) } if (snd_BUG_ON(minor < 0 || minor >= SNDRV_OS_MINORS)) return -EINVAL; + if (snd_minors[minor]) + return -EBUSY; return minor; } #endif @@ -276,13 +278,7 @@ int snd_register_device(int type, struct snd_card *card, int dev, preg->private_data = private_data; preg->card_ptr = card; mutex_lock(&sound_mutex); -#ifdef CONFIG_SND_DYNAMIC_MINORS - minor = snd_find_free_minor(type); -#else - minor = snd_kernel_minor(type, card, dev); - if (minor >= 0 && snd_minors[minor]) - minor = -EBUSY; -#endif + minor = snd_find_free_minor(type, card, dev); if (minor < 0) { err = minor; goto error; diff --git a/sound/core/timer.c b/sound/core/timer.c index 490b489d713d..a9a1a047c521 100644 --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -774,10 +774,8 @@ int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, if (rtimer) *rtimer = NULL; timer = kzalloc(sizeof(*timer), GFP_KERNEL); - if (timer == NULL) { - pr_err("ALSA: timer: cannot allocate\n"); + if (!timer) return -ENOMEM; - } timer->tmr_class = tid->dev_class; timer->card = card; timer->tmr_device = tid->device; |