[alsa-devel] [PATCH 1/2] alsabat: fix alsabat -86 error

[keqiao.zhang at intel.com]

From: "Keqiao, Zhang" <keqiao.zhang at intel.com>

alsabat reports -86 error when system suspend and resume. Check the
return value of read_to_pcm() and write_to_pcm(), when -x8 err is
detected, do resume and wait for read/write to pcm to complete.

Write PCM device error: Streams pipe error(-86)
Read PCM device error: Streams pipe error(-86)
*** Error in alsabat: double free or corruption (out): 0x00007fb438001810 ***

Signed-off-by: Keqiao, Zhang <keqiao.zhang at intel.com>
---
 bat/alsa.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/bat/alsa.c b/bat/alsa.c
index cef1734..7613f44 100644
--- a/bat/alsa.c
+++ b/bat/alsa.c
@@ -319,6 +319,11 @@ static int write_to_pcm(const struct pcm_container *sndpcm,
 			if (bat->roundtriplatency)
 				bat->latency.xrun_error = true;
 			snd_pcm_prepare(sndpcm->handle);
+		} else if (err == -ESTRPIPE) {
+			while ((err = snd_pcm_resume(sndpcm->handle)) == -EAGAIN)
+				sleep(1);  /* wait until resume flag is released */
+			if (err < 0)
+				snd_pcm_prepare(sndpcm->handle);
 		} else if (err < 0) {
 			fprintf(bat->err, _("Write PCM device error: %s(%d)\n"),
 					snd_strerror(err), err);
@@ -518,6 +523,11 @@ static int read_from_pcm(struct pcm_container *sndpcm,
 					snd_strerror(err), err);
 			if (bat->roundtriplatency)
 				bat->latency.xrun_error = true;
+		} else if (err == -ESTRPIPE) {
+			while ((err = snd_pcm_resume(sndpcm->handle)) == -EAGAIN)
+				sleep(1);  /* wait until resume flag is released */
+			if (err < 0)
+				snd_pcm_prepare(sndpcm->handle);
 		} else if (err < 0) {
 			fprintf(bat->err, _("Read PCM device error: %s(%d)\n"),
 					snd_strerror(err), err);
-- 
2.5.0