[PATCH 1/1] scsi: storvsc: Always set no_report_opcodes

[Michael Kelley]

Hyper-V synthetic SCSI devices do not support the MAINTENANCE_IN SCSI
command, so scsi_report_opcode() always fails, resulting in messages
like this:

hv_storvsc <guid>: tag#205 cmd 0xa3 status: scsi 0x2 srb 0x86 hv 0xc0000001

The recently added support for command duration limits calls
scsi_report_opcode() four times as each device comes online, which
significantly increases the number of messages logged in a system with
many disks.

Fix the problem by always marking Hyper-V synthetic SCSI devices as
not supporting scsi_report_opcode(). With this setting, the
MAINTENANCE_IN SCSI command is not issued and no messages are logged.

Signed-off-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
---
 drivers/scsi/storvsc_drv.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index e6bc622..659196a 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -1567,6 +1567,8 @@ static int storvsc_device_configure(struct scsi_device *sdevice)
 {
 	blk_queue_rq_timeout(sdevice->request_queue, (storvsc_timeout * HZ));
 
+	/* storvsc devices don't support MAINTENANCE_IN SCSI cmd */
+	sdevice->no_report_opcodes = 1;
 	sdevice->no_write_same = 1;
 
 	/*
-- 
1.8.3.1