[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>

1 files changed, 20 insertions, 7 deletions

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 7b0f9a3810d2..764a8b375ead 100644
--- 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: