diff options
| author |   K. Y. Srinivasan <kys@microsoft.com> | 2014-12-16 13:21:45 -0800 |
|---|---|---|
| committer |   Christoph Hellwig <hch@lst.de> | 2015-01-09 15:44:27 +0100 |
| commit | b0a93d96b2814c725161f91a4e35d0c29ec0f95b (patch) | |
| tree | 23c6b6c240200b09738bb6ebeae65c6e8be2a114 /drivers/scsi/storvsc_drv.c | |
| parent | storvsc: fix a bug in storvsc limits (diff) | |
| download | linux-dev-b0a93d96b2814c725161f91a4e35d0c29ec0f95b.tar.xz linux-dev-b0a93d96b2814c725161f91a4e35d0c29ec0f95b.zip | |
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>
Diffstat (limited to 'drivers/scsi/storvsc_drv.c')
| -rw-r--r-- | 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 caa9f0ea217c..efc6e446b6c8 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -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; } |