linux-kernel - Re: [patch 01/21] V4L: cx88: Fix lockup on suspend

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Date:	Wed, 21 Feb 2007 20:00:06 -0500
From:	Chuck Ebbert <cebbert@...hat.com>
To:	Greg KH <greg@...ah.com>
CC:	linux-kernel@...r.kernel.org, stable@...nel.org,
	Justin Forbes <jmforbes@...uxtx.org>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	"Theodore Ts'o" <tytso@....edu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>,
	Chris Wedgwood <reviews@...cw.f00f.org>,
	Michael Krufky <mkrufky@...uxtv.org>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Robert Hancock <hancockr@...w.ca>,
	Mauro Carvalho Chehab <mchehab@...radead.org>
Subject: Re: [patch 01/21] V4L: cx88: Fix lockup on suspend

Greg KH wrote:
> -stable review patch.  If anyone has any objections, please let us know.
> 
> ------------------
> 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@...w.ca>
> Signed-off-by: Mauro Carvalho Chehab <mchehab@...radead.org>
> Signed-off-by: Michael Krufky <mkrufky@...uxtv.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
> 
> ---
>  drivers/media/video/cx88/cx88-tvaudio.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> --- linux-2.6.19.4.orig/drivers/media/video/cx88/cx88-tvaudio.c
> +++ linux-2.6.19.4/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>
> @@ -974,6 +975,7 @@ 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));
> 

drivers/media/video/cx88/cx88-tvaudio.c:41:27: error: linux/freezer.h: No such file or directory
make[4]: *** [drivers/media/video/cx88/cx88-tvaudio.o] Error 1
make[3]: *** [drivers/media/video/cx88] Error 2
make[3]: *** Waiting for unfinished jobs....

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