Re: http://bugzilla.kernel.org/show_bug.cgi?id=11742

[Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>]

On Monday 27 October 2008, Borislav Petkov wrote:
> On Sun, Oct 26, 2008 at 09:01:42PM +0100, Valerio Passini wrote:
> 
> [.. ]
> 
> > Here I am, thus the patched kernel has been installed and tested.
> > Burning CD's and simulation work perfectly and everything seems fine.
> > :)
> 
> Well, nice to hear :). Thanks for your debugging effort and patience.
> 
> Bart, please apply.
> 
> ---
> From: Borislav Petkov <petkovbb@gmail.com>
> Date: Mon, 27 Oct 2008 06:59:14 +0100
> Subject: [PATCH] ide-cd: fix dma alignment regression
> 
> e5318b531b008c79d2a0c0df06a7b8628da38e2f introduced a regression which
> caused some ATAPI drives to turn off dma for REQ_TYPE_ATA_PC commands

I believe you meant REQ_TYPE_BLOCK_PC here.

> while burning and thus degrating performance and ultimately causing an
> excessive amount of underruns. The issue is documented also in
> http://bugzilla.kernel.org/show_bug.cgi?id=11742.
> 
> Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
> CC: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
> Tested-by: Valerio Passini <valerio.passini@unicam.it>

applied (with patch description fixups suggested by Sergei)