diff options
Diffstat (limited to 'drivers/iio/industrialio-buffer.c')
| -rw-r--r-- | drivers/iio/industrialio-buffer.c | 93 |
1 files changed, 48 insertions, 45 deletions
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 4ada5592aa2b..9fa238c0a7d4 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -189,10 +189,12 @@ __poll_t iio_buffer_poll(struct file *filp, */ void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) { - if (!indio_dev->buffer) + struct iio_buffer *buffer = indio_dev->buffer; + + if (!buffer) return; - wake_up(&indio_dev->buffer->pollq); + wake_up(&buffer->pollq); } void iio_buffer_init(struct iio_buffer *buffer) @@ -262,10 +264,11 @@ static ssize_t iio_scan_el_show(struct device *dev, { int ret; struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct iio_buffer *buffer = indio_dev->buffer; /* Ensure ret is 0 or 1. */ ret = !!test_bit(to_iio_dev_attr(attr)->address, - indio_dev->buffer->scan_mask); + buffer->scan_mask); return sprintf(buf, "%d\n", ret); } @@ -316,8 +319,7 @@ static int iio_scan_mask_set(struct iio_dev *indio_dev, const unsigned long *mask; unsigned long *trialmask; - trialmask = kcalloc(BITS_TO_LONGS(indio_dev->masklength), - sizeof(*trialmask), GFP_KERNEL); + trialmask = bitmap_zalloc(indio_dev->masklength, GFP_KERNEL); if (trialmask == NULL) return -ENOMEM; if (!indio_dev->masklength) { @@ -382,7 +384,7 @@ static ssize_t iio_scan_el_store(struct device *dev, if (ret < 0) return ret; mutex_lock(&indio_dev->mlock); - if (iio_buffer_is_active(indio_dev->buffer)) { + if (iio_buffer_is_active(buffer)) { ret = -EBUSY; goto error_ret; } @@ -411,7 +413,9 @@ static ssize_t iio_scan_el_ts_show(struct device *dev, char *buf) { struct iio_dev *indio_dev = dev_to_iio_dev(dev); - return sprintf(buf, "%d\n", indio_dev->buffer->scan_timestamp); + struct iio_buffer *buffer = indio_dev->buffer; + + return sprintf(buf, "%d\n", buffer->scan_timestamp); } static ssize_t iio_scan_el_ts_store(struct device *dev, @@ -421,6 +425,7 @@ static ssize_t iio_scan_el_ts_store(struct device *dev, { int ret; struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct iio_buffer *buffer = indio_dev->buffer; bool state; ret = strtobool(buf, &state); @@ -428,11 +433,11 @@ static ssize_t iio_scan_el_ts_store(struct device *dev, return ret; mutex_lock(&indio_dev->mlock); - if (iio_buffer_is_active(indio_dev->buffer)) { + if (iio_buffer_is_active(buffer)) { ret = -EBUSY; goto error_ret; } - indio_dev->buffer->scan_timestamp = state; + buffer->scan_timestamp = state; error_ret: mutex_unlock(&indio_dev->mlock); @@ -440,10 +445,10 @@ error_ret: } static int iio_buffer_add_channel_sysfs(struct iio_dev *indio_dev, + struct iio_buffer *buffer, const struct iio_chan_spec *chan) { int ret, attrcount = 0; - struct iio_buffer *buffer = indio_dev->buffer; ret = __iio_add_chan_devattr("index", chan, @@ -519,7 +524,7 @@ static ssize_t iio_buffer_write_length(struct device *dev, return len; mutex_lock(&indio_dev->mlock); - if (iio_buffer_is_active(indio_dev->buffer)) { + if (iio_buffer_is_active(buffer)) { ret = -EBUSY; } else { buffer->access->set_length(buffer, val); @@ -540,7 +545,9 @@ static ssize_t iio_buffer_show_enable(struct device *dev, char *buf) { struct iio_dev *indio_dev = dev_to_iio_dev(dev); - return sprintf(buf, "%d\n", iio_buffer_is_active(indio_dev->buffer)); + struct iio_buffer *buffer = indio_dev->buffer; + + return sprintf(buf, "%d\n", iio_buffer_is_active(buffer)); } static unsigned int iio_storage_bytes_for_si(struct iio_dev *indio_dev, @@ -687,6 +694,13 @@ static int iio_verify_update(struct iio_dev *indio_dev, bool scan_timestamp; unsigned int modes; + if (insert_buffer && + bitmap_empty(insert_buffer->scan_mask, indio_dev->masklength)) { + dev_dbg(&indio_dev->dev, + "At least one scan element must be enabled first\n"); + return -EINVAL; + } + memset(config, 0, sizeof(*config)); config->watermark = ~0; @@ -913,6 +927,7 @@ static int iio_enable_buffers(struct iio_dev *indio_dev, indio_dev->active_scan_mask = config->scan_mask; indio_dev->scan_timestamp = config->scan_timestamp; indio_dev->scan_bytes = config->scan_bytes; + indio_dev->currentmode = config->mode; iio_update_demux(indio_dev); @@ -948,8 +963,6 @@ static int iio_enable_buffers(struct iio_dev *indio_dev, goto err_disable_buffers; } - indio_dev->currentmode = config->mode; - if (indio_dev->setup_ops->postenable) { ret = indio_dev->setup_ops->postenable(indio_dev); if (ret) { @@ -966,10 +979,10 @@ err_disable_buffers: buffer_list) iio_buffer_disable(buffer, indio_dev); err_run_postdisable: - indio_dev->currentmode = INDIO_DIRECT_MODE; if (indio_dev->setup_ops->postdisable) indio_dev->setup_ops->postdisable(indio_dev); err_undo_config: + indio_dev->currentmode = INDIO_DIRECT_MODE; indio_dev->active_scan_mask = NULL; return ret; @@ -1004,8 +1017,6 @@ static int iio_disable_buffers(struct iio_dev *indio_dev) ret = ret2; } - indio_dev->currentmode = INDIO_DIRECT_MODE; - if (indio_dev->setup_ops->postdisable) { ret2 = indio_dev->setup_ops->postdisable(indio_dev); if (ret2 && !ret) @@ -1014,6 +1025,7 @@ static int iio_disable_buffers(struct iio_dev *indio_dev) iio_free_scan_mask(indio_dev, indio_dev->active_scan_mask); indio_dev->active_scan_mask = NULL; + indio_dev->currentmode = INDIO_DIRECT_MODE; return ret; } @@ -1123,6 +1135,7 @@ static ssize_t iio_buffer_store_enable(struct device *dev, int ret; bool requested_state; struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct iio_buffer *buffer = indio_dev->buffer; bool inlist; ret = strtobool(buf, &requested_state); @@ -1132,17 +1145,15 @@ static ssize_t iio_buffer_store_enable(struct device *dev, mutex_lock(&indio_dev->mlock); /* Find out if it is in the list */ - inlist = iio_buffer_is_active(indio_dev->buffer); + inlist = iio_buffer_is_active(buffer); /* Already in desired state */ if (inlist == requested_state) goto done; if (requested_state) - ret = __iio_update_buffers(indio_dev, - indio_dev->buffer, NULL); + ret = __iio_update_buffers(indio_dev, buffer, NULL); else - ret = __iio_update_buffers(indio_dev, - NULL, indio_dev->buffer); + ret = __iio_update_buffers(indio_dev, NULL, buffer); done: mutex_unlock(&indio_dev->mlock); @@ -1184,7 +1195,7 @@ static ssize_t iio_buffer_store_watermark(struct device *dev, goto out; } - if (iio_buffer_is_active(indio_dev->buffer)) { + if (iio_buffer_is_active(buffer)) { ret = -EBUSY; goto out; } @@ -1201,11 +1212,9 @@ static ssize_t iio_dma_show_data_available(struct device *dev, char *buf) { struct iio_dev *indio_dev = dev_to_iio_dev(dev); - size_t bytes; - - bytes = iio_buffer_data_available(indio_dev->buffer); + struct iio_buffer *buffer = indio_dev->buffer; - return sprintf(buf, "%zu\n", bytes); + return sprintf(buf, "%zu\n", iio_buffer_data_available(buffer)); } static DEVICE_ATTR(length, S_IRUGO | S_IWUSR, iio_buffer_read_length, @@ -1233,7 +1242,7 @@ int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) struct iio_dev_attr *p; struct attribute **attr; struct iio_buffer *buffer = indio_dev->buffer; - int ret, i, attrn, attrcount, attrcount_orig = 0; + int ret, i, attrn, attrcount; const struct iio_chan_spec *channels; channels = indio_dev->channels; @@ -1277,12 +1286,7 @@ int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) indio_dev->groups[indio_dev->groupcounter++] = &buffer->buffer_group; - if (buffer->scan_el_attrs != NULL) { - attr = buffer->scan_el_attrs->attrs; - while (*attr++ != NULL) - attrcount_orig++; - } - attrcount = attrcount_orig; + attrcount = 0; INIT_LIST_HEAD(&buffer->scan_el_dev_attr_list); channels = indio_dev->channels; if (channels) { @@ -1291,7 +1295,7 @@ int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) if (channels[i].scan_index < 0) continue; - ret = iio_buffer_add_channel_sysfs(indio_dev, + ret = iio_buffer_add_channel_sysfs(indio_dev, buffer, &channels[i]); if (ret < 0) goto error_cleanup_dynamic; @@ -1319,10 +1323,7 @@ int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) ret = -ENOMEM; goto error_free_scan_mask; } - if (buffer->scan_el_attrs) - memcpy(buffer->scan_el_group.attrs, buffer->scan_el_attrs, - sizeof(buffer->scan_el_group.attrs[0])*attrcount_orig); - attrn = attrcount_orig; + attrn = 0; list_for_each_entry(p, &buffer->scan_el_dev_attr_list, l) buffer->scan_el_group.attrs[attrn++] = &p->dev_attr.attr; @@ -1334,20 +1335,22 @@ error_free_scan_mask: bitmap_free(buffer->scan_mask); error_cleanup_dynamic: iio_free_chan_devattr_list(&buffer->scan_el_dev_attr_list); - kfree(indio_dev->buffer->buffer_group.attrs); + kfree(buffer->buffer_group.attrs); return ret; } void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) { - if (!indio_dev->buffer) + struct iio_buffer *buffer = indio_dev->buffer; + + if (!buffer) return; - bitmap_free(indio_dev->buffer->scan_mask); - kfree(indio_dev->buffer->buffer_group.attrs); - kfree(indio_dev->buffer->scan_el_group.attrs); - iio_free_chan_devattr_list(&indio_dev->buffer->scan_el_dev_attr_list); + bitmap_free(buffer->scan_mask); + kfree(buffer->buffer_group.attrs); + kfree(buffer->scan_el_group.attrs); + iio_free_chan_devattr_list(&buffer->scan_el_dev_attr_list); } /** |