Commit b0a93d96 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Christoph Hellwig

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: default avatarK. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: default avatarLong Li <longli@microsoft.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 0fb8db29
......@@ -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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