[SCSI] Fix DVD burning issues.

Some pioneer DVDs are apparently returning odd "not ready" status
codes that the mid-layer doesn't recognise and so passes back to the
user as errors.

This patch overhauls our not-ready handling and adds transparent retries for:

format in progress
rebuild in progress
recalculation in progress
operation in progress
Long write in progress
self test in progress

The Pioneer was actually returning "long write in progress"

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 7b0f9a3..764a8b3 100644 (file)
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1067,16 +1067,29 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes,
                        break;
                case NOT_READY:
                        /*
-                        * If the device is in the process of becoming ready,
-                        * retry.
+                        * If the device is in the process of becoming
+                        * ready, or has a temporary blockage, retry.
                         */
-                       if (sshdr.asc == 0x04 && sshdr.ascq == 0x01) {
-                               scsi_requeue_command(q, cmd);
-                               return;
+                       if (sshdr.asc == 0x04) {
+                               switch (sshdr.ascq) {
+                               case 0x01: /* becoming ready */
+                               case 0x04: /* format in progress */
+                               case 0x05: /* rebuild in progress */
+                               case 0x06: /* recalculation in progress */
+                               case 0x07: /* operation in progress */
+                               case 0x08: /* Long write in progress */
+                               case 0x09: /* self test in progress */
+                                       scsi_requeue_command(q, cmd);
+                                       return;
+                               default:
+                                       break;
+                               }
                        }
-                       if (!(req->flags & REQ_QUIET))
+                       if (!(req->flags & REQ_QUIET)) {
                                scmd_printk(KERN_INFO, cmd,
-                                          "Device not ready.\n");
+                                          "Device not ready: ");
+                               scsi_print_sense_hdr("", &sshdr);
+                       }
                        scsi_end_request(cmd, 0, this_count, 1);
                        return;
                case VOLUME_OVERFLOW: