linux-kernel - Re: [PATCH 6/7] drivers: scsi: storvsc: Set srb

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Date:	Mon, 14 Jul 2014 08:17:12 +0200
From:	Hannes Reinecke <hare@...e.de>
To:	"K. Y. Srinivasan" <kys@...rosoft.com>, jasowang@...hat.com,
	apw@...onical.com, linux-kernel@...r.kernel.org,
	devel@...uxdriverproject.org, ohering@...e.com,
	jbottomley@...allels.com, hch@...radead.org,
	linux-scsi@...r.kernel.org
CC:	stable@...r.kernel.org
Subject: Re: [PATCH 6/7] drivers: scsi: storvsc: Set srb_flags in all cases

On 07/12/2014 06:48 PM, K. Y. Srinivasan wrote:
> Correctly set SRB flags for all valid I/O directions. Some IHV drivers on the
> Windows host require this. The host validates the command and SRB flags
> prior to passing the command down to native driver stack.
>
> Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
> Cc: <stable@...r.kernel.org>
> ---
>   drivers/scsi/storvsc_drv.c |   12 +++++-------
>   1 files changed, 5 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
> index 3516761..9342ba4 100644
> --- a/drivers/scsi/storvsc_drv.c
> +++ b/drivers/scsi/storvsc_drv.c
> @@ -1599,26 +1599,24 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
>   	vm_srb = &cmd_request->vstor_packet.vm_srb;
>   	vm_srb->win8_extension.time_out_value = 60;
>
> +	vm_srb->win8_extension.srb_flags |=
> +		(SRB_FLAGS_QUEUE_ACTION_ENABLE |
> +		SRB_FLAGS_DISABLE_SYNCH_TRANSFER);
>
>   	/* Build the SRB */
>   	switch (scmnd->sc_data_direction) {
>   	case DMA_TO_DEVICE:
>   		vm_srb->data_in = WRITE_TYPE;
>   		vm_srb->win8_extension.srb_flags |= SRB_FLAGS_DATA_OUT;
> -		vm_srb->win8_extension.srb_flags |=
> -			(SRB_FLAGS_QUEUE_ACTION_ENABLE |
> -			SRB_FLAGS_DISABLE_SYNCH_TRANSFER);
>   		break;
>   	case DMA_FROM_DEVICE:
>   		vm_srb->data_in = READ_TYPE;
>   		vm_srb->win8_extension.srb_flags |= SRB_FLAGS_DATA_IN;
> -		vm_srb->win8_extension.srb_flags |=
> -			(SRB_FLAGS_QUEUE_ACTION_ENABLE |
> -			SRB_FLAGS_DISABLE_SYNCH_TRANSFER);
>   		break;
>   	default:
>   		vm_srb->data_in = UNKNOWN_TYPE;
> -		vm_srb->win8_extension.srb_flags = 0;
> +		vm_srb->win8_extension.srb_flags |= (SRB_FLAGS_DATA_IN |
> +						     SRB_FLAGS_DATA_OUT);
>   		break;
>   	}
>
>
Reviewed-by: Hannes Reinecke <hare@...e.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@...e.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
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