linux-kernel - Re: [PATCH] ata: uncomment ata_timing for XFER_PIO

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Message-ID: <20121214112301.54cb4a8d@pyramind.ukuu.org.uk>
Date:	Fri, 14 Dec 2012 11:23:01 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
Cc:	linux-kernel@...r.kernel.org, Borislav Petkov <bp@...en8.de>,
	Jeff Garzik <jgarzik@...hat.com>
Subject: Re: [PATCH] ata: uncomment ata_timing for XFER_PIO_SLOW

On Fri, 14 Dec 2012 15:01:37 +0400
Konstantin Khlebnikov <khlebnikov@...nvz.org> wrote:

> This patch uncomments ata timings for XFER_PIO_SLOW,
> otherwise ata_timing_find_mode() returns NULL and kernel crashes in
> pacpi_set_dmamode() after null-pointer dereference.

NAK please see the previous discussion of this and the correct fix to set
up the dma timings field properly when it isn't available (0xFF not 0x00)

Alan
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