linux-kernel - [PATCH 3/6] staging: lustre: handle error returned from wait_event

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Date:	Sat, 12 Mar 2016 13:00:33 -0500
From:	James Simmons <jsimmons@...radead.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devel@...verdev.osuosl.org,
	Andreas Dilger <andreas.dilger@...el.com>,
	Oleg Drokin <oleg.drokin@...el.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Lustre Development List <lustre-devel@...ts.lustre.org>,
	James Simmons <jsimmons@...radead.org>
Subject: [PATCH 3/6] staging: lustre: handle error returned from wait_event_timeout seltest timer

The function wait_event_timeout can fail and return an error. Handle
this case in stt_timer_main().

Signed-off-by: James Simmons <jsimmons@...radead.org>
---
 drivers/staging/lustre/lnet/selftest/timer.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/lustre/lnet/selftest/timer.c b/drivers/staging/lustre/lnet/selftest/timer.c
index 8be5252..ef8a8a7 100644
--- a/drivers/staging/lustre/lnet/selftest/timer.c
+++ b/drivers/staging/lustre/lnet/selftest/timer.c
@@ -170,20 +170,22 @@ stt_check_timers(unsigned long *last)
 static int
 stt_timer_main(void *arg)
 {
+	int rc = 0;
+
 	cfs_block_allsigs();
 
 	while (!stt_data.stt_shuttingdown) {
 		stt_check_timers(&stt_data.stt_prev_slot);
 
-		wait_event_timeout(stt_data.stt_waitq,
-				   stt_data.stt_shuttingdown,
-				   cfs_time_seconds(STTIMER_SLOTTIME));
+		rc = wait_event_timeout(stt_data.stt_waitq,
+					stt_data.stt_shuttingdown,
+					cfs_time_seconds(STTIMER_SLOTTIME));
 	}
 
 	spin_lock(&stt_data.stt_lock);
 	stt_data.stt_nthreads--;
 	spin_unlock(&stt_data.stt_lock);
-	return 0;
+	return rc;
 }
 
 static int
-- 
1.7.1