linux-kernel - RE: [PATCH RESEND 1/1] Drivers: scsi: storvsc: Properly handle errors from the host

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Date:	Tue, 10 Apr 2012 15:13:39 +0000
From:	KY Srinivasan <kys@...rosoft.com>
To:	KY Srinivasan <kys@...rosoft.com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"virtualization@...ts.osdl.org" <virtualization@...ts.osdl.org>,
	"ohering@...e.com" <ohering@...e.com>,
	"jbottomley@...allels.com" <jbottomley@...allels.com>,
	"hch@...radead.org" <hch@...radead.org>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	"apw@...onical.com" <apw@...onical.com>
Subject: RE: [PATCH RESEND 1/1] Drivers: scsi: storvsc: Properly handle
 errors from the host



> -----Original Message-----
> From: K. Y. Srinivasan [mailto:kys@...rosoft.com]
> Sent: Thursday, April 05, 2012 3:27 PM
> To: gregkh@...uxfoundation.org; linux-kernel@...r.kernel.org;
> devel@...uxdriverproject.org; virtualization@...ts.osdl.org; ohering@...e.com;
> jbottomley@...allels.com; hch@...radead.org; linux-scsi@...r.kernel.org;
> apw@...onical.com
> Cc: KY Srinivasan
> Subject: [PATCH RESEND 1/1] Drivers: scsi: storvsc: Properly handle errors from
> the host
> 
> If the host returns error for pass through commands, deal with them
> appropriately. I would like to thank James for patiently helping
> me with this patch.

James,

Thank you for suggesting the fix here. I hope this is what you were looking for.

Regards,

K. Y
> 
> Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
> Reviewed-by: Haiyang Zhang <haiyangz@...rosoft.com>
> ---
>  drivers/scsi/storvsc_drv.c |   20 +++++++++++++++-----
>  1 files changed, 15 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
> index 83a1972..528d52b 100644
> --- a/drivers/scsi/storvsc_drv.c
> +++ b/drivers/scsi/storvsc_drv.c
> @@ -785,12 +785,22 @@ static void storvsc_command_completion(struct
> storvsc_cmd_request *cmd_request)
>  	/*
>  	 * If there is an error; offline the device since all
>  	 * error recovery strategies would have already been
> -	 * deployed on the host side.
> +	 * deployed on the host side. However, if the command
> +	 * were a pass-through command deal with it appropriately.
>  	 */
> -	if (vm_srb->srb_status == SRB_STATUS_ERROR)
> -		scmnd->result = DID_TARGET_FAILURE << 16;
> -	else
> -		scmnd->result = vm_srb->scsi_status;
> +	scmnd->result = vm_srb->scsi_status;
> +
> +	if (vm_srb->srb_status == SRB_STATUS_ERROR) {
> +		switch (scmnd->cmnd[0]) {
> +		case ATA_16:
> +		case ATA_12:
> +			set_host_byte(scmnd, DID_PASSTHROUGH);
> +			break;
> +		default:
> +			set_host_byte(scmnd, DID_TARGET_FAILURE);
> +		}
> +	}
> +
> 
>  	/*
>  	 * If the LUN is invalid; remove the device.
> --
> 1.7.4.1
> 
> 
> 



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