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    SubjectRE: [PATCH 4/4] Drivers: scsi: storvsc: Force SPC-3 compliance on win8 and win8 r2 hosts
    Date


    > -----Original Message-----
    > From: devel [mailto:driverdev-devel-bounces@linuxdriverproject.org] On
    > Behalf Of K. Y. Srinivasan
    > Sent: Tuesday, December 16, 2014 1:22 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
    > 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.Bottomley@HansenPartnership.com>
    > Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
    Reviewed-by: Long Li <longli@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
    >
    > _______________________________________________
    > devel mailing list
    > devel@linuxdriverproject.org
    > http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel


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