[patch 13/18] V4L: cx88: Fix lockup on suspend

[Greg KH]

-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Robert Hancock <hancockr@xxxxxxx>

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.

(cherry picked from commit a96afb3e9428f2e7463344f12dbc85faf08e2e09)

Signed-off-by: Robert Hancock <hancockr@xxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx>
Signed-off-by: Michael Krufky <mkrufky@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

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

--- linux-2.6.18.7.orig/drivers/media/video/cx88/cx88-tvaudio.c
+++ linux-2.6.18.7/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>
@@ -979,6 +980,7 @@ 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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