linux-kernel - Re: [PATCH v3 2/2] ata: implement MODE SELECT command

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Message-ID: <502E8940.7040500@pobox.com>
Date:	Fri, 17 Aug 2012 14:11:12 -0400
From:	Jeff Garzik <jgarzik@...ox.com>
To:	Paolo Bonzini <pbonzini@...hat.com>
CC:	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	sshtylyov@...sta.com
Subject: Re: [PATCH v3 2/2] ata: implement MODE SELECT command

On 07/05/2012 08:18 AM, Paolo Bonzini wrote:
> The cache_type file in sysfs lets users configure the disk cache in
> write-through or write-back modes.  However, ata disks do not support
> writing to the file because they do not implement the MODE SELECT
> command.
>
> This patch adds a translation from MODE SELECT (for the caching page
> only) to the ATA SET FEATURES command.  The set of changeable parameters
> answered by MODE SENSE is also adjusted accordingly.
>
> Cc: Sergei Shtylyov <sshtylyov@...sta.com>
> Cc: Jeff Garzik <jgarzik@...ox.com>
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
> ---
> 	v2->v3: ensure that only the first page of the sg list is
> 	accessed
>
>   drivers/ata/libata-scsi.c |  194 +++++++++++++++++++++++++++++++++++++++++++--
>   1 files changed, 188 insertions(+), 6 deletions(-)

applied 1-2



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