> -----Original Message-----
> From: devel [mailto:driverdev-devel-boun...@linuxdriverproject.org] On
> Behalf Of K. Y. Srinivasan
> Sent: Tuesday, December 16, 2014 1:22 PM
> To: gre...@linuxfoundation.org; linux-ker...@vger.kernel.org;
> de...@linuxdriverproject.org; oher...@suse.com;
> jbottom...@parallels.com; h...@infradead.org; linux-s...@vger.kernel.org
> Subject: [PATCH 4/4] Drivers: scsi: storvsc: Force SPC-3 compliance on win8
> and win8 r2 hosts
>
> On win8 and win8 r2 hosts force SPC-3 compliance for MSFT virtual disks.
> Ubuntu has been carrying a similar patch outside the tree for a while now.
> Starting with win10, the host will support SPC-3 compliance. Based on all the
> testing that has been done on win8 and win8 r2 hosts, we are comfortable
> claiming SPC-3 compliance on these hosts as well. This will enable TRIM
> support on these hosts.
>
> Suggested by: James Bottomley
> <james.bottom...@hansenpartnership.com>
> Signed-off-by: K. Y. Srinivasan <k...@microsoft.com>
Reviewed-by: Long Li <lon...@microsoft.com>
> ---
> drivers/scsi/storvsc_drv.c | 13 +++++++++++++
> 1 files changed, 13 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index
> fdc5164..7487e07 100644
> --- a/drivers/scsi/storvsc_drv.c
> +++ b/drivers/scsi/storvsc_drv.c
> @@ -1468,6 +1468,19 @@ static int storvsc_device_configure(struct
> scsi_device *sdevice)
> */
> sdevice->sdev_bflags |= msft_blist_flags;
>
> + /*
> + * If the host is WIN8 or WIN8 R2, claim conformance to SPC-3
> + * if the device is a MSFT virtual device.
> + */
> + if (!strncmp(sdevice->vendor, "Msft", 4)) {
> + switch (vmbus_proto_version) {
> + case VERSION_WIN8:
> + case VERSION_WIN8_1:
> + sdevice->scsi_level = SCSI_SPC_3;
> + break;
> + }
> + }
> +
> return 0;
> }
>
> --
> 1.7.4.1
>
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