cciss: fix handling of protocol error

If a command completes with a status of CMD_PROTOCOL_ERR, this
information should be conveyed to the SCSI mid layer, not dropped
on the floor.  Unlike a similar bug in the hpsa driver, this bug
only affects tape drives and CD and DVD ROM drives in the cciss
driver, and to induce it, you have to disconnect (or damage) a
cable, so it is not a very likely scenario (which would explain
why the bug has gone undetected for the last 10 years.)

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index 38aa6dda6b81d0deeb355956ead087324f41f3d1..da3311129a0c5b87b8cc8b3718cc63b5bdfd3928 100644 (file)
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -795,6 +795,7 @@ static void complete_scsi_command(CommandList_struct *c, int timeout,
                                }
                        break;
                        case CMD_PROTOCOL_ERR:
+                               cmd->result = DID_ERROR << 16;
                                dev_warn(&h->pdev->dev,
                                        "%p has protocol error\n", c);
                         break;