From 547b29006ede389971d74ca0c03b9eea06c063b6 Mon Sep 17 00:00:00 2001
From: James Bottomley <James.Bottomley@suse.de>
Date: Tue, 4 May 2010 16:51:40 -0400
Subject: [PATCH] --- yaml --- r: 190740 b: refs/heads/master c:
 77a4229719e511a0d38d9c355317ae1469adeb54 h: refs/heads/master v: v3

---
 [refs]                          |  2 +-
 trunk/drivers/scsi/scsi_error.c | 15 ++++++++++++++-
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index 4556231dac5b..1921cfdaa12c 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c213e1407be6b04b144794399a91472e0ef92aec
+refs/heads/master: 77a4229719e511a0d38d9c355317ae1469adeb54
diff --git a/trunk/drivers/scsi/scsi_error.c b/trunk/drivers/scsi/scsi_error.c
index d45c69ca5737..7ad53fa42766 100644
--- a/trunk/drivers/scsi/scsi_error.c
+++ b/trunk/drivers/scsi/scsi_error.c
@@ -302,7 +302,20 @@ static int scsi_check_sense(struct scsi_cmnd *scmd)
 		if (scmd->device->allow_restart &&
 		    (sshdr.asc == 0x04) && (sshdr.ascq == 0x02))
 			return FAILED;
-		return SUCCESS;
+
+		if (blk_barrier_rq(scmd->request))
+			/*
+			 * barrier requests should always retry on UA
+			 * otherwise block will get a spurious error
+			 */
+			return NEEDS_RETRY;
+		else
+			/*
+			 * for normal (non barrier) commands, pass the
+			 * UA upwards for a determination in the
+			 * completion functions
+			 */
+			return SUCCESS;
 
 		/* these three are not supported */
 	case COPY_ABORTED: