From: Andy Whitcroft <apw@xxxxxxxxxxxxx> Suggested-by: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> Signed-off-by: Andy Whitcroft <apw@xxxxxxxxxxxxx> --- Original patch title changed slightly by Ian Abbott <abbotti@xxxxxxxxx> 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 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
