Merge branch '2.6.33.4' into rt/2.6.33

Conflicts:
	Makefile

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 08ed506e6059..e46155b006dc 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -301,7 +301,20 @@ 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: