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    SubjectRE: [PATCH 6/6] scsi: storvsc: Allow write_same when host is windows 10
    Date


    > -----Original Message-----
    > From: devel [mailto:driverdev-devel-bounces@linuxdriverproject.org] On
    > Behalf Of K. Y. Srinivasan
    > Sent: Friday, May 29, 2015 1:29 PM
    > To: gregkh@linuxfoundation.org; linux-kernel@vger.kernel.org;
    > devel@linuxdriverproject.org; ohering@suse.com; jbottomley@parallels.com;
    > hch@infradead.org; linux-scsi@vger.kernel.org; apw@canonical.com;
    > vkuznets@redhat.com; jasowang@redhat.com
    > Cc: Keith Mange
    > Subject: [PATCH 6/6] scsi: storvsc: Allow write_same when host is windows 10
    >
    > From: keith.mange@microsoft.com <keith.mange@microsoft.com>
    >
    > Allow WRITE_SAME for Windows10 and above hosts.
    >
    Reviewed-by: Long Li <longli@microsoft.com>
    > Tested-by: Alex Ng <alexng@microsoft.com>
    > Signed-off-by: Keith Mange <keith.mange@microsoft.com>
    > Signed-off-by: K. Y. Srinivasan <kys@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
    >
    > _______________________________________________
    > devel mailing list
    > devel@linuxdriverproject.org
    > http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel


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