st: clear ILI if Medium Error

Some drives set the ILI flag together with MEDIUM ERROR sense code.
Clear the ILI flag in this case so that the medium error will be
handled.  The problem was reported by Maurizio Lombardi.

Signed-off-by: Kai Mäkisara <kai.makisara@kolumbus.fi>
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index dbf1882cfbacd03efca9aa9f096cc0dcc5ae40e0..7af5226aa55ba0937b69b8b0f2d5d070f3eccf7d 100644 (file)
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -1974,9 +1974,12 @@ static long read_tape(struct scsi_tape *STp, long count,
                                        transfer = (int)cmdstatp->uremainder64;
                                else
                                        transfer = 0;
-                               if (STp->block_size == 0 &&
-                                   cmdstatp->sense_hdr.sense_key == MEDIUM_ERROR)
-                                       transfer = bytes;
+                               if (cmdstatp->sense_hdr.sense_key == MEDIUM_ERROR) {
+                                       if (STp->block_size == 0)
+                                               transfer = bytes;
+                                       /* Some drives set ILI with MEDIUM ERROR */
+                                       cmdstatp->flags &= ~SENSE_ILI;
+                               }
 
                                if (cmdstatp->flags & SENSE_ILI) {      /* ILI */
                                        if (STp->block_size == 0 &&