> -----Original Message-----
> From: devel [mailto:driverdev-devel-boun...@linuxdriverproject.org] On
> Behalf Of K. Y. Srinivasan
> Sent: Friday, May 29, 2015 1:29 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; a...@canonical.com;
> vkuzn...@redhat.com; jasow...@redhat.com
> Cc: Keith Mange
> Subject: [PATCH 6/6] scsi: storvsc: Allow write_same when host is windows 10
>
> From: keith.ma...@microsoft.com <keith.ma...@microsoft.com>
>
> Allow WRITE_SAME for Windows10 and above hosts.
>
Reviewed-by: Long Li <lon...@microsoft.com>
> Tested-by: Alex Ng <ale...@microsoft.com>
> Signed-off-by: Keith Mange <keith.ma...@microsoft.com>
> Signed-off-by: K. Y. Srinivasan <k...@microsoft.com>
> ---
> drivers/scsi/storvsc_drv.c | 6 +++++-
> 1 files changed, 5 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index
> 58fa47a..021cbdf 100644
> --- a/drivers/scsi/storvsc_drv.c
> +++ b/drivers/scsi/storvsc_drv.c
> @@ -1488,7 +1488,8 @@ static int storvsc_device_configure(struct
> scsi_device *sdevice)
>
> /*
> * If the host is WIN8 or WIN8 R2, claim conformance to SPC-3
> - * if the device is a MSFT virtual device.
> + * if the device is a MSFT virtual device. If the host is
> + * WIN10 or newer, allow write_same.
> */
> if (!strncmp(sdevice->vendor, "Msft", 4)) {
> switch (vmstor_proto_version) {
> @@ -1497,6 +1498,9 @@ static int storvsc_device_configure(struct
> scsi_device *sdevice)
> sdevice->scsi_level = SCSI_SPC_3;
> break;
> }
> +
> + if (vmstor_proto_version >=
> VMSTOR_PROTO_VERSION_WIN10)
> + sdevice->no_write_same = 0;
> }
>
> return 0;
> --
> 1.7.4.1
>
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> de...@linuxdriverproject.org
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