linux-kernel - [PATCH 3/9] V4L/DVB (5021): Cx88xx: Fix lockup on suspend

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Message-id: <20070115183705.PS7841950003@infradead.org>
Date:	Mon, 15 Jan 2007 16:37:05 -0200
From:	Mauro Carvalho Chehab <mchehab@...radead.org>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	V4L-DVB Maintainers <v4l-dvb-maintainer@...uxtv.org>,
	Robert Hancock <hancockr@...w.ca>,
	Mauro Carvalho Chehab <mchehab@...radead.org>
Subject: [PATCH 3/9] V4L/DVB (5021): Cx88xx: Fix lockup on suspend


From: Robert Hancock <hancockr@...w.ca>

Suspending with the cx88xx module loaded causes the system to lock up
because the cx88_audio_thread kthread was missing a try_to_freeze()
call, which caused it to go into a tight loop and result in softlockup
when suspending. Fix that.

Signed-off-by: Robert Hancock <hancockr@...w.ca>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...radead.org>
---

 drivers/media/video/cx88/cx88-tvaudio.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/media/video/cx88/cx88-tvaudio.c b/drivers/media/video/cx88/cx88-tvaudio.c
index 3482e01..2bd84d3 100644
--- a/drivers/media/video/cx88/cx88-tvaudio.c
+++ b/drivers/media/video/cx88/cx88-tvaudio.c
@@ -38,6 +38,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/errno.h>
+#include <linux/freezer.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/mm.h>
@@ -961,6 +962,7 @@ int cx88_audio_thread(void *data)
 		msleep_interruptible(1000);
 		if (kthread_should_stop())
 			break;
+		try_to_freeze();
 
 		/* just monitor the audio status for now ... */
 		memset(&t, 0, sizeof(t));

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