Re: [PATCH] mptsas: fix dma alignment

[Vitaly Bordug <vitb@kernel.crashing.org>]

В Mon, 7 Sep 2009 16:42:54 +0530
"Desai, Kashyap" <Kashyap.Desai@lsi.com> пишет:

> Can you send an exact link for "465ff.. commit"?
> 
Sure, 
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=465ff3185e0cb76d46137335a4d21d0d9d3ac8a2

> Thanks,
> Kashyap
> 
> -----Original Message-----
> From: Vitaly Bordug [mailto:vitb@kernel.crashing.org] 
> Sent: Wednesday, September 02, 2009 2:34 AM
> To: Moore, Eric
> Cc: DL-MPT Fusion Linux; linux-scsi@vger.kernel.org
> Subject: [PATCH] mptsas: fix dma alignment
> 
> 
> From: Yuri Tikhonov <yur@emcraft.com>
> 
> fusion mptsas: fix dma alignment
> 
>      Since the 465ff.. commit from James Bottomley relaxes the default
>      SCSI DMA alignment from 512 bytes to 4 bytes, then, in the mptsas
>      driver, we should explicitly set the alignment to the workable
>      512 bytes value.
> 
>     Signed-off-by: Ilya Yanok <yanok@emcraft.com>
>     Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
>     Signed-off-by: Sergei Poselenov <sposelenov@emcraft.com>
>     Signed-off-by: Vitaly Bordug <vitb@kernel.crashing.org>
> ---
> 
>  drivers/message/fusion/mptsas.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> 
> diff --git a/drivers/message/fusion/mptsas.c
> b/drivers/message/fusion/mptsas.c index 55ff252..2334f26 100644
> --- a/drivers/message/fusion/mptsas.c
> +++ b/drivers/message/fusion/mptsas.c
> @@ -1843,6 +1843,7 @@ mptsas_slave_alloc(struct scsi_device *sdev)
>  	return -ENXIO;
>  
>   out:
> +	blk_queue_update_dma_alignment(sdev->request_queue, 511);
>  	vdevice->vtarget->num_luns++;
>  	sdev->hostdata = vdevice;
>  	return 0;
--
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