From b95f5be09069526cf53705acbc1e22600f3f550b Mon Sep 17 00:00:00 2001 From: Keith Mange Date: Thu, 13 Aug 2015 08:43:51 -0700 Subject: [PATCH] storvsc: Allow write_same when host is windows 10 Allow WRITE_SAME for Windows10 and above hosts. Tested-by: Alex Ng Signed-off-by: Keith Mange Signed-off-by: K. Y. Srinivasan Signed-off-by: James Bottomley --- drivers/scsi/storvsc_drv.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index 97219a0bb280..cbb1bd1e020c 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -1480,7 +1480,8 @@ static int storvsc_device_configure(struct scsi_device *sdevice) /* * If the host is WIN8 or WIN8 R2, claim conformance to SPC-3 - * if the device is a MSFT virtual device. + * if the device is a MSFT virtual device. If the host is + * WIN10 or newer, allow write_same. */ if (!strncmp(sdevice->vendor, "Msft", 4)) { switch (vmstor_proto_version) { @@ -1489,6 +1490,9 @@ static int storvsc_device_configure(struct scsi_device *sdevice) sdevice->scsi_level = SCSI_SPC_3; break; } + + if (vmstor_proto_version >= VMSTOR_PROTO_VERSION_WIN10) + sdevice->no_write_same = 0; } return 0; -- 2.20.1