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-rw-r--r--sound/core/control.c80
-rw-r--r--sound/core/oss/pcm_oss.c6
-rw-r--r--sound/core/oss/pcm_plugin.c6
-rw-r--r--sound/core/pcm_native.c14
4 files changed, 59 insertions, 47 deletions
diff --git a/sound/core/control.c b/sound/core/control.c
index 9aa15bfc7936..649d3217590e 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -348,6 +348,40 @@ static int snd_ctl_find_hole(struct snd_card *card, unsigned int count)
return 0;
}
+/* add a new kcontrol object; call with card->controls_rwsem locked */
+static int __snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol)
+{
+ struct snd_ctl_elem_id id;
+ unsigned int idx;
+ unsigned int count;
+
+ id = kcontrol->id;
+ if (id.index > UINT_MAX - kcontrol->count)
+ return -EINVAL;
+
+ if (snd_ctl_find_id(card, &id)) {
+ dev_err(card->dev,
+ "control %i:%i:%i:%s:%i is already present\n",
+ id.iface, id.device, id.subdevice, id.name, id.index);
+ return -EBUSY;
+ }
+
+ if (snd_ctl_find_hole(card, kcontrol->count) < 0)
+ return -ENOMEM;
+
+ list_add_tail(&kcontrol->list, &card->controls);
+ card->controls_count += kcontrol->count;
+ kcontrol->id.numid = card->last_numid + 1;
+ card->last_numid += kcontrol->count;
+
+ id = kcontrol->id;
+ count = kcontrol->count;
+ for (idx = 0; idx < count; idx++, id.index++, id.numid++)
+ snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_ADD, &id);
+
+ return 0;
+}
+
/**
* snd_ctl_add - add the control instance to the card
* @card: the card instance
@@ -364,45 +398,18 @@ static int snd_ctl_find_hole(struct snd_card *card, unsigned int count)
*/
int snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol)
{
- struct snd_ctl_elem_id id;
- unsigned int idx;
- unsigned int count;
int err = -EINVAL;
if (! kcontrol)
return err;
if (snd_BUG_ON(!card || !kcontrol->info))
goto error;
- id = kcontrol->id;
- if (id.index > UINT_MAX - kcontrol->count)
- goto error;
down_write(&card->controls_rwsem);
- if (snd_ctl_find_id(card, &id)) {
- up_write(&card->controls_rwsem);
- dev_err(card->dev, "control %i:%i:%i:%s:%i is already present\n",
- id.iface,
- id.device,
- id.subdevice,
- id.name,
- id.index);
- err = -EBUSY;
- goto error;
- }
- if (snd_ctl_find_hole(card, kcontrol->count) < 0) {
- up_write(&card->controls_rwsem);
- err = -ENOMEM;
- goto error;
- }
- list_add_tail(&kcontrol->list, &card->controls);
- card->controls_count += kcontrol->count;
- kcontrol->id.numid = card->last_numid + 1;
- card->last_numid += kcontrol->count;
- id = kcontrol->id;
- count = kcontrol->count;
+ err = __snd_ctl_add(card, kcontrol);
up_write(&card->controls_rwsem);
- for (idx = 0; idx < count; idx++, id.index++, id.numid++)
- snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_ADD, &id);
+ if (err < 0)
+ goto error;
return 0;
error:
@@ -1361,9 +1368,12 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file,
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;
+ down_write(&card->controls_rwsem);
+ err = __snd_ctl_add(card, kctl);
+ if (err < 0) {
+ snd_ctl_free_one(kctl);
+ goto unlock;
+ }
offset = snd_ctl_get_ioff(kctl, &info->id);
snd_ctl_build_ioff(&info->id, kctl, offset);
/*
@@ -1374,10 +1384,10 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file,
* which locks the element.
*/
- down_write(&card->controls_rwsem);
card->user_ctl_count++;
- up_write(&card->controls_rwsem);
+ unlock:
+ up_write(&card->controls_rwsem);
return 0;
}
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index f8d4a419f3af..467039b342b5 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -1062,8 +1062,8 @@ static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
runtime->oss.channels = params_channels(params);
runtime->oss.rate = params_rate(params);
- vfree(runtime->oss.buffer);
- runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
+ kvfree(runtime->oss.buffer);
+ runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
if (!runtime->oss.buffer) {
err = -ENOMEM;
goto failure;
@@ -2328,7 +2328,7 @@ static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime;
runtime = substream->runtime;
- vfree(runtime->oss.buffer);
+ kvfree(runtime->oss.buffer);
runtime->oss.buffer = NULL;
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
snd_pcm_oss_plugin_clear(substream);
diff --git a/sound/core/oss/pcm_plugin.c b/sound/core/oss/pcm_plugin.c
index 141c5f3a9575..31cb2acf8afc 100644
--- a/sound/core/oss/pcm_plugin.c
+++ b/sound/core/oss/pcm_plugin.c
@@ -66,8 +66,8 @@ static int snd_pcm_plugin_alloc(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t
return -ENXIO;
size /= 8;
if (plugin->buf_frames < frames) {
- vfree(plugin->buf);
- plugin->buf = vmalloc(size);
+ kvfree(plugin->buf);
+ plugin->buf = kvzalloc(size, GFP_KERNEL);
plugin->buf_frames = frames;
}
if (!plugin->buf) {
@@ -191,7 +191,7 @@ int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin)
if (plugin->private_free)
plugin->private_free(plugin);
kfree(plugin->buf_channels);
- vfree(plugin->buf);
+ kvfree(plugin->buf);
kfree(plugin);
return 0;
}
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 66c90f486af9..818dff1de545 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -36,6 +36,7 @@
#include <sound/timer.h>
#include <sound/minors.h>
#include <linux/uio.h>
+#include <linux/delay.h>
#include "pcm_local.h"
@@ -91,12 +92,12 @@ static DECLARE_RWSEM(snd_pcm_link_rwsem);
* and this may lead to a deadlock when the code path takes read sem
* twice (e.g. one in snd_pcm_action_nonatomic() and another in
* snd_pcm_stream_lock()). As a (suboptimal) workaround, let writer to
- * spin until it gets the lock.
+ * sleep until all the readers are completed without blocking by writer.
*/
-static inline void down_write_nonblock(struct rw_semaphore *lock)
+static inline void down_write_nonfifo(struct rw_semaphore *lock)
{
while (!down_write_trylock(lock))
- cond_resched();
+ msleep(1);
}
#define PCM_LOCK_DEFAULT 0
@@ -1967,7 +1968,7 @@ static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
res = -ENOMEM;
goto _nolock;
}
- down_write_nonblock(&snd_pcm_link_rwsem);
+ down_write_nonfifo(&snd_pcm_link_rwsem);
write_lock_irq(&snd_pcm_link_rwlock);
if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
substream->runtime->status->state != substream1->runtime->status->state ||
@@ -2014,7 +2015,7 @@ static int snd_pcm_unlink(struct snd_pcm_substream *substream)
struct snd_pcm_substream *s;
int res = 0;
- down_write_nonblock(&snd_pcm_link_rwsem);
+ down_write_nonfifo(&snd_pcm_link_rwsem);
write_lock_irq(&snd_pcm_link_rwlock);
if (!snd_pcm_stream_linked(substream)) {
res = -EALREADY;
@@ -2369,7 +2370,8 @@ int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
static void pcm_release_private(struct snd_pcm_substream *substream)
{
- snd_pcm_unlink(substream);
+ if (snd_pcm_stream_linked(substream))
+ snd_pcm_unlink(substream);
}
void snd_pcm_release_substream(struct snd_pcm_substream *substream)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.