This patch suppresses error messages when copying between two arrays that
support XCOPY each, but that cannot copy data between each other.

Signed-off-by: Mikulas Patocka <mpato...@redhat.com>

---
 drivers/scsi/sd.c |   12 ++++++++++++
 1 file changed, 12 insertions(+)

Index: linux-3.18-rc1/drivers/scsi/sd.c
===================================================================
--- linux-3.18-rc1.orig/drivers/scsi/sd.c       2014-10-21 00:48:51.000000000 
+0200
+++ linux-3.18-rc1/drivers/scsi/sd.c    2014-10-21 00:49:21.000000000 +0200
@@ -1935,6 +1935,18 @@ static int sd_done(struct scsi_cmnd *SCp
                                        req->cmd_flags |= REQ_QUIET;
                                }
                        }
+               } else if (sshdr.asc == 0x26) {
+                       switch (op) {
+                       /*
+                        * Copying between two arrays that support XCOPY, but
+                        * cannot access each other.
+                        */
+                       case EXTENDED_COPY:
+                               good_bytes = 0;
+                               req->__data_len = blk_rq_bytes(req);
+                               req->cmd_flags |= REQ_QUIET;
+                               break;
+                       }
                }
                break;
        default:

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