linux-kernel - Re: [patch, -git] drivers/media build fix for modular builds

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Date:	Wed, 30 Apr 2008 13:12:04 -0300
From:	Mauro Carvalho Chehab <mchehab@...radead.org>
To:	Mike Galbraith <efault@....de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	David Miller <davem@...emloft.net>,
	torvalds@...ux-foundation.org, linux-dvb-maintainer@...uxtv.org,
	video4linux-list@...hat.com, linux-kernel@...r.kernel.org,
	sfr@...b.auug.org.au, Sam Ravnborg <sam@...nborg.org>
Subject: Re: [patch, -git] drivers/media build fix for modular builds

On Wed, 30 Apr 2008 17:48:10 +0200
Mike Galbraith <efault@....de> wrote:

> 
> On Wed, 2008-04-30 at 12:25 -0300, Mauro Carvalho Chehab wrote:
> 
> > Please try this patch. It should avoid an OOPS, if attach fails.
> 
> Different oops.
> 

Detach order were wrong.

Try this, please.

diff -r d05d249a98a7 linux/drivers/media/video/cx88/cx88-dvb.c
--- a/linux/drivers/media/video/cx88/cx88-dvb.c	Wed Apr 30 12:45:00 2008 -0300
+++ b/linux/drivers/media/video/cx88/cx88-dvb.c	Wed Apr 30 13:09:51 2008 -0300
@@ -516,8 +516,8 @@
 	if (!fe) {
 		printk(KERN_ERR "%s/2: xc3028 attach failed\n",
 		       dev->core->name);
+		dvb_unregister_frontend(dev->dvb.frontend);
 		dvb_frontend_detach(dev->dvb.frontend);
-		dvb_unregister_frontend(dev->dvb.frontend);
 		dev->dvb.frontend = NULL;
 		return -EINVAL;
 	}
diff -r d05d249a98a7 linux/drivers/media/video/saa7134/saa7134-dvb.c
--- a/linux/drivers/media/video/saa7134/saa7134-dvb.c	Wed Apr 30 12:45:00 2008 -0300
+++ b/linux/drivers/media/video/saa7134/saa7134-dvb.c	Wed Apr 30 13:09:51 2008 -0300
@@ -1345,8 +1345,8 @@
 	return ret;
 
 dettach_frontend:
+	dvb_unregister_frontend(dev->dvb.frontend);
 	dvb_frontend_detach(dev->dvb.frontend);
-	dvb_unregister_frontend(dev->dvb.frontend);
 	dev->dvb.frontend = NULL;
 
 	return -1;

Cheers,
Mauro
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