From 048568bbea700dfd9921b40321f8d5aa7e5ef417 Mon Sep 17 00:00:00 2001 From: "Alexander E. Patrakov" Date: Mon, 15 Sep 2014 20:17:47 +0600 Subject: pcm, rate: hw_avail must not be negative before starting the stream If it is, then it means most likely the driver problem, so we should return error immediately instead. Signed-off-by: Alexander E. Patrakov Signed-off-by: Jaroslav Kysela --- src/pcm/pcm_rate.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/pcm/pcm_rate.c b/src/pcm/pcm_rate.c index 736d5583..c76db25b 100644 --- a/src/pcm/pcm_rate.c +++ b/src/pcm/pcm_rate.c @@ -1069,7 +1069,10 @@ static int snd_pcm_rate_start(snd_pcm_t *pcm) gettimestamp(&rate->trigger_tstamp, pcm->tstamp_type); avail = snd_pcm_mmap_playback_hw_avail(rate->gen.slave); - if (avail <= 0) { + if (avail < 0) /* can't happen on healthy drivers */ + return -EBADFD; + + if (avail == 0) { /* postpone the trigger since we have no data committed yet */ rate->start_pending = 1; return 0; -- cgit v1.2.3