From: Long Li <longli@microsoft.com>
Date: Thu, 15 Dec 2016 02:46:02 +0000 (-0800)
Subject: scsi: storvsc: properly handle SRB_ERROR when sense message is present
X-Git-Tag: v4.11-rc1~141^2~183
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=bba5dc332ec2d3a685cb4dae668c793f6a3713a3;p=karo-tx-linux.git

scsi: storvsc: properly handle SRB_ERROR when sense message is present

When sense message is present on error, we should pass along to the upper
layer to decide how to deal with the error.
This patch fixes connectivity issues with Fiber Channel devices.

Signed-off-by: Long Li <longli@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---

diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 320938720544..3c92dc2a25a0 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -924,6 +924,13 @@ static void storvsc_handle_error(struct vmscsi_request *vm_srb,
 
 	switch (SRB_STATUS(vm_srb->srb_status)) {
 	case SRB_STATUS_ERROR:
+		/*
+		 * Let upper layer deal with error when
+		 * sense message is present.
+		 */
+
+		if (vm_srb->srb_status & SRB_STATUS_AUTOSENSE_VALID)
+			break;
 		/*
 		 * If there is an error; offline the device since all
 		 * error recovery strategies would have already been