From: Andre Noll <maan@tuebingen.mpg.de>
Date: Thu, 7 Jan 2021 23:55:13 +0000 (+0100)
Subject: alsa_write: Avoid hung tasks.
X-Git-Tag: v0.6.3~1
X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=commitdiff_plain;h=fd1f28d32ca04a2ecbe272d68f89c38cbafdaad9

alsa_write: Avoid hung tasks.

Without this fix the alsa writer may never shutdown, occupying a
slot of audiod. The hang was observed with in conjunction to the
udp receiver and the prebuffer filter. See also the recent commit
23913cbbfc98.
---

diff --git a/alsa_write.c b/alsa_write.c
index 363e3930..bc06fc31 100644
--- a/alsa_write.c
+++ b/alsa_write.c
@@ -266,6 +266,8 @@ static int alsa_write_post_select(__a_unused struct sched *s, void *context)
 		goto err;
 again:
 	ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_LEAF);
+	if (ret < 0)
+		goto err;
 	if (ret == 0)
 		return 0;
 	btr_merge(btrn, wn->min_iqs);