missed patch from prior commit

0001-alsa-sink-clear-pollfd-revents-before-poll.patch

@@ -0,0 +1,40 @@
+From 0b3c52341d1d8d098f315302d6d3e1c40965493f Mon Sep 17 00:00:00 2001
+From: Kai Vehmanen <kai.vehmanen@linux.intel.com>
+Date: Wed, 3 Jul 2019 17:09:51 +0300
+Subject: [PATCH] alsa-sink: clear pollfd revents before poll
+
+Always clear revents before calling snd_pcm_poll_descriptors_revents()
+as the ALSA function will not clear out existing events.
+
+Without this, playback restart fails in the following
+scenario:
+
+1. single stream PCM playback ongoing
+2. system put to system suspend (S3), ALSA sink suspended
+3. system resumes, ALSA sink restarted
+4. upon first alsa-sink thread_func iteration, rtpoll
+  revents still hass POLLERR bits set (due to the suspend)
+5. execution goes to pa_alsa_recover_from_poll()
+6. snd_pcm_drop() is called and PCM is restarted
+7. process loops from (4) and playback is never recovered
+
+Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
+---
+ src/modules/alsa/alsa-sink.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/modules/alsa/alsa-sink.c b/src/modules/alsa/alsa-sink.c
+index 4568a19c5..d96f19398 100644
+--- a/src/modules/alsa/alsa-sink.c
++++ b/src/modules/alsa/alsa-sink.c
+@@ -1915,6 +1915,7 @@ static void thread_func(void *userdata) {
+             unsigned n;
+ 
+             pollfd = pa_rtpoll_item_get_pollfd(u->alsa_rtpoll_item, &n);
++            pollfd->revents = 0;
+ 
+             if ((err = snd_pcm_poll_descriptors_revents(u->pcm_handle, pollfd, n, &revents)) < 0) {
+                 pa_log("snd_pcm_poll_descriptors_revents() failed: %s", pa_alsa_strerror(err));
+-- 
+2.21.0
+