linux-kernel - Re: [PATCH] amba-pl011: fix panic introduced by "clear pending interrupts"

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Date:	Tue, 27 Mar 2012 09:07:22 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Alessandro Rubini <rubini@...dd.com>
Cc:	linux-kernel@...r.kernel.org,
	Giancarlo Asnaghi <giancarlo.asnaghi@...com>,
	Alan Cox <alan@...ux.intel.com>, gregkh@...uxfoundation.org,
	linux-serial@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] amba-pl011: fix panic introduced by "clear pending interrupts"

On Mon, Mar 26, 2012 at 10:32 PM, Alessandro Rubini <rubini@...dd.com> wrote:

> patch 9b96fba, currently in linux-next, clears interrupts using
> uap->port.membase that has not been assigned.  My x86 system,
> that uses a pci-to-amba bridge, panics with a message like:
>
>   BUG: unable to handle kernel NULL pointer dereference at 00000038
>   IP: [<c12c85ed>] pl011_probe+0x119/0x303
>
> Signed-off-by: Alessandro Rubini <rubini@...dd.com>
> Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@...com>

Yep I know, already sent the remedy, just waiting for Greg to pick it up:
http://marc.info/?l=linux-serial&m=133235774423240&w=2

But thanks for the quick attention :-)

Yours,
Linus Walleij
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