From: K. Y. Srinivasan <kys@microsoft.com>
Date: Sat, 12 Jul 2014 16:48:32 +0000 (-0700)
Subject: drivers: scsi: storvsc: Correctly handle TEST_UNIT_READY failure
X-Git-Url: http://git.mmlx.us/?a=commitdiff_plain;h=8ce6d81a2d174a0cecc1efbaf2d218c90d2e2fbd;p=linux-edison.git

drivers: scsi: storvsc: Correctly handle TEST_UNIT_READY failure

commit 3533f8603d28b77c62d75ec899449a99bc6b77a1 upstream.

On some Windows hosts on FC SANs, TEST_UNIT_READY can return SRB_STATUS_ERROR.
Correctly handle this. Note that there is sufficient sense information to
support scsi error handling even in this case.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 34a8f526908..87ca72d36d5 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -804,6 +804,13 @@ static void storvsc_handle_error(struct vmscsi_request *vm_srb,
 		case ATA_12:
 			set_host_byte(scmnd, DID_PASSTHROUGH);
 			break;
+		/*
+		 * On Some Windows hosts TEST_UNIT_READY command can return
+		 * SRB_STATUS_ERROR, let the upper level code deal with it
+		 * based on the sense information.
+		 */
+		case TEST_UNIT_READY:
+			break;
 		default:
 			set_host_byte(scmnd, DID_TARGET_FAILURE);
 		}