[PATCH] alsa-sink: Avoid unloading alsa-sink module before calling try_recover()

[z.kempczynsk@xxxxxxxxxxx (Zbigniew Kempczyński)]

This fixes rare condition when pulseaudio client tries to rewind,
but a device previously reached underrun and was changed to XRUN state.
---
 src/modules/alsa/alsa-sink.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/modules/alsa/alsa-sink.c b/src/modules/alsa/alsa-sink.c
index b6c7d09..a912259 100644
--- a/src/modules/alsa/alsa-sink.c
+++ b/src/modules/alsa/alsa-sink.c
@@ -1628,8 +1628,14 @@ static int process_rewind(struct userdata *u) {
     pa_log_debug("Requested to rewind %lu bytes.", (unsigned long) rewind_nbytes);
 
     if (PA_UNLIKELY((unused = pa_alsa_safe_avail(u->pcm_handle, u->hwbuf_size, &u->sink->sample_spec)) < 0)) {
+        int ret;
         pa_log("snd_pcm_avail() failed: %s", pa_alsa_strerror((int) unused));
-        return -1;
+        if ((ret = try_recover(u, "snd_pcm_avail", (int) unused)) == 0) {
+            pa_log("try recover in process_rewind() succeed (ret = %d)", ret);
+        } else {
+            pa_log("try recover in process_rewind() failed! (ret = %d)", ret);
+            return -1;
+        }
     }
 
     unused_nbytes = (size_t) unused * u->frame_size;
-- 
2.1.4