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authorVinod Koul <vinod.koul@intel.com>2013-04-29 14:25:23 +0530
committerTakashi Iwai <tiwai@suse.de>2013-04-29 13:33:18 +0200
commit754813473c1a8b7711802313125f0fafc60141f8 (patch)
tree3d948cec2f7b73756c4cbb548546db57f0a17b22 /sound
parenta555bb8c6bf6932c5706745bfdbad22df26324d9 (diff)
downloadkernel-754813473c1a8b7711802313125f0fafc60141f8.tar.gz
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>
Diffstat (limited to 'sound')
-rw-r--r--sound/core/compress_offload.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c
index a0bc47f8dcf7..99db892d7299 100644
--- a/sound/core/compress_offload.c
+++ b/sound/core/compress_offload.c
@@ -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;
}