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

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Message-ID: <20110819183521.1b5f7efe@schatten.dmk.lab>
Date:	Fri, 19 Aug 2011 18:35:21 +0200
From:	Florian Mickler <florian@...kler.org>
To:	mchehab@...radead.org
Cc:	Florian Mickler <florian@...kler.org>, tino.keitel@...ei.de,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	"v3.0.y" <stable@...nel.org>
Subject: Re: [PATCH] [media] vp7045: fix buffer setup

On Wed, 10 Aug 2011 12:05:20 +0200
Florian Mickler <florian@...kler.org> 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.
> 
> References: https://bugzilla.kernel.org/show_bug.cgi?id=40062
> Cc: v3.0.y <stable@...nel.org>
> Tested-by: Tino Keitel <tino.keitel@...ei.de>
> Signed-off-by: Florian Mickler <florian@...kler.org>

...ping...
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