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ALSA: compress: fix the states to check for allowing read 

for reading compressed data, we need to allow when we are paused, draining or
stopped.

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Cc: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Cc: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Vinod Koul 2013-04-29 14:25:23 +05:30 committed by Takashi Iwai
parent a555bb8c6b
commit 754813473c
1 changed files with 10 additions and 2 deletions
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12
sound/core/compress_offload.c
View File

@ -311,8 +311,16 @@ static ssize_t snd_compr_read(struct file *f, char __user *buf,
stream = &data->stream;
mutex_lock(&stream->device->lock);
/* read is allowed when stream is running */
if (stream->runtime->state != SNDRV_PCM_STATE_RUNNING) {
/* read is allowed when stream is running, paused, draining and setup
* (yes setup is state which we transition to after stop, so if user
* wants to read data after stop we allow that)
*/
switch (stream->runtime->state) {
case SNDRV_PCM_STATE_OPEN:
case SNDRV_PCM_STATE_PREPARED:
case SNDRV_PCM_STATE_XRUN:
case SNDRV_PCM_STATE_SUSPENDED:
case SNDRV_PCM_STATE_DISCONNECTED:
retval = -EBADFD;
goto out;
}