[ALSA] Fix pcm-draining of capture stream in PCM middle layer

Fix the draining of PCM capture stream in the PCM middle layer.
snd_pcm_drain() ignored capture streams, but it should change
the state to SNDRV_PCM_DRAINING.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index a998f88e3f30e3d17a7d6cdd26702f68b9b14790..9e495244eee2198613b32c6edf05258b77c2d7af 100644 (file)
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -1469,8 +1469,6 @@ static int snd_pcm_drain(struct snd_pcm_substream *substream)
                }
        }
        up_read(&snd_pcm_link_rwsem);
-       if (! num_drecs)
-               goto _error;
 
        snd_pcm_stream_lock_irq(substream);
        /* resume pause */