linux-kernel - [PATCH 3.10 069/268] scsi: storvsc: properly handle SRB

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Message-Id: <1497897167-14556-70-git-send-email-w@1wt.eu>
Date:   Mon, 19 Jun 2017 20:29:28 +0200
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Long Li <longli@...rosoft.com>,
        "K . Y . Srinivasan" <kys@...rosoft.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 069/268] scsi: storvsc: properly handle SRB_ERROR when sense message is present

From: Long Li <longli@...rosoft.com>

commit bba5dc332ec2d3a685cb4dae668c793f6a3713a3 upstream.

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@...rosoft.com>
Reviewed-by: K. Y. Srinivasan <kys@...rosoft.com>
Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/scsi/storvsc_drv.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 913b91c..2729023 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -795,6 +795,13 @@ static void storvsc_handle_error(struct vmscsi_request *vm_srb,
 	switch (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
 		 * deployed on the host side. However, if the command
-- 
2.8.0.rc2.1.gbe9624a