linux-kernel - Re: [PATCH 1/7] Add support hardreset

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Date:	Tue, 17 Apr 2012 15:06:20 +0400
From:	Sergei Shtylyov <sshtylyov@...sta.com>
To:	"Thang Q. Nguyen" <tqnguyen@....com>
CC:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Jeff Garzik <jgarzik@...ox.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>, Phong Vo <pvo@....com>,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	linux-ide@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH 1/7] Add support hardreset

Hello.

On 17-04-2012 12:43, Thang Q. Nguyen wrote:

>   The hardreset operation is currently not supported. This causes sometime the SATA driver does cause kernel crash because of none-determined state.a This patch will fix the issue.

> Signed-off-by: Thang Q. Nguyen<tqnguyen@....com>
> ---
>   drivers/ata/sata_dwc_460ex.c |   24 +++++++++++++++++++++++-
>   1 files changed, 23 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c
> index 69f7cde..ae13ef1 100644
> --- a/drivers/ata/sata_dwc_460ex.c
> +++ b/drivers/ata/sata_dwc_460ex.c
> @@ -1581,10 +1581,31 @@ static void sata_dwc_qc_prep(struct ata_queued_cmd *qc)
>
>   static void sata_dwc_error_handler(struct ata_port *ap)
>   {
> -	ap->link.flags |= ATA_LFLAG_NO_HRST;
>   	ata_sff_error_handler(ap);
>   }

    Could eliminate this, switching to the default implementation...

MBR, Sergei
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