[ALSA] OSS PCM emulation - The final fix for SNDCTL_DSP_GETOPTR problem
ALSA<-OSS emulation
The problem was negative result (info.bytes) in a specific condition at
playback startup.
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 468fca8..203470d 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -1539,10 +1539,13 @@
} else {
delay = snd_pcm_oss_bytes(substream, delay) + fixup;
info.blocks = delay / runtime->oss.period_bytes;
- if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ if (runtime->oss.bytes == 0)
+ delay = 0;
info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
- else
+ } else {
info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
+ }
}
if (copy_to_user(_info, &info, sizeof(info)))
return -EFAULT;