ALSA: ctxfi - Add missing start check in atc_pcm_playback_start()

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

1 files changed, 4 insertions, 0 deletions

diff --git a/sound/pci/ctxfi/ctatc.c b/sound/pci/ctxfi/ctatc.c
index 4e25b24848bd..799eb98e7794 100644
--- a/sound/pci/ctxfi/ctatc.c
+++ b/sound/pci/ctxfi/ctatc.c
@@ -392,6 +392,10 @@ static int atc_pcm_playback_start(struct ct_atc *atc, struct ct_atc_pcm *apcm)
         unsigned int max_cisz;
         struct src *src = apcm->src;
 
+        if (apcm->started)
+                return 0;
+        apcm->started = 1;
+
         max_cisz = src->multi * src->rsc.msr;
         max_cisz = 0x80 * (max_cisz < 8 ? max_cisz : 8);