linux-kernel - Re: [PATCH] [media] vp7045: fix buffer setup

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Date:	Wed, 3 Aug 2011 21:02:04 +0200
From:	Tino Keitel <tino.keitel@...ei.de>
To:	Florian Mickler <florian@...kler.org>
Cc:	mchehab@...radead.org, linux-kernel@...r.kernel.org,
	error27@...il.com
Subject: Re: [PATCH] [media] vp7045: fix buffer setup

On Tue, Aug 02, 2011 at 14:29:05 +0200, Florian Mickler wrote:
> dvb_usb_device_init calls the frontend_attach method of this driver which
> uses vp7045_usb_ob. In order to have a buffer ready in vp7045_usb_op, it has to
> be allocated before that happens.
> 
> Luckily we can use the whole private data as the buffer as it gets separately
> allocated on the heap via kzalloc in dvb_usb_device_init and is thus apt for
> use via usb_control_msg.
> 
> This fixes a
> 	BUG: unable to handle kernel paging request at 0000000000001e78
> 
> reported by Tino Keitel and diagnosed by Dan Carpenter.
> 
> Reported-by: Tino Keitel <tino.keitel@...ei.de>
> Reported-by: Dan Carpenter <error27@...il.com>
> Signed-off-by: Florian Mickler <florian@...kler.org>
> ---
> 
> Tino, can you test this?

Hi,

thanks for the patch. It works fine on top of 3.0. No more Oops at
boot, and the DVB-T receiver is working.

Regards,
Tino
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