From: Andy Whitcroft <[email protected]>
Suggested-by: James Bottomley <[email protected]>
Signed-off-by: Andy Whitcroft <[email protected]>
---
Original patch title changed slightly by Ian Abbott <[email protected]>
due to typo.
---
drivers/scsi/storvsc_drv.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 9969fa1..3903c8a 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -1441,6 +1441,14 @@ static int storvsc_device_configure(struct scsi_device
*sdevice)
sdevice->no_write_same = 1;
+ /*
+ * hyper-v lies about its capabilities indicating it is only SPC-2
+ * compliant, but actually implements the core SPC-3 features.
+ * If we pretend to be SPC-3, we send RC16 which activates trim and
+ * will query the appropriate VPD pages to enable trim.
+ */
+ sdevice->scsi_level = SCSI_SPC_3;
+
return 0;
}
--
1.9.2
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