Commit b0a93d96 authored Dec 16, 2014 by K. Y. Srinivasan Committed by Christoph Hellwig Jan 09, 2015

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>
Signed-off-by: Christoph Hellwig <hch@lst.de>

parent 0fb8db29

drivers/scsi/storvsc_drv.c

+13 −0

Original line number	Diff line number	Diff line
		@@ -1394,6 +1394,19 @@ 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;
		}

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