Merge branch 'for-2.6.36' of git://git.kernel.dk/linux-2.6-block

[pandora-kernel.git] / drivers / scsi / scsi_error.c

diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 2768bf6..bbbc186 100644 (file)
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -307,7 +307,33 @@ static int scsi_check_sense(struct scsi_cmnd *scmd)
                    (sshdr.asc == 0x04) && (sshdr.ascq == 0x02))
                        return FAILED;
 
-               return NEEDS_RETRY;
+               if (sshdr.asc == 0x3f && sshdr.ascq == 0x0e)
+                       scmd_printk(KERN_WARNING, scmd,
+                                   "Warning! Received an indication that the "
+                                   "LUN assignments on this target have "
+                                   "changed. The Linux SCSI layer does not "
+                                   "automatically remap LUN assignments.\n");
+               else if (sshdr.asc == 0x3f)
+                       scmd_printk(KERN_WARNING, scmd,
+                                   "Warning! Received an indication that the "
+                                   "operating parameters on this target have "
+                                   "changed. The Linux SCSI layer does not "
+                                   "automatically adjust these parameters.\n");
+
+               if (scmd->request->cmd_flags & REQ_HARDBARRIER)
+                       /*
+                        * barrier requests should always retry on UA
+                        * otherwise block will get a spurious error
+                        */
+                       return NEEDS_RETRY;
+               else
+                       /*
+                        * for normal (non barrier) commands, pass the
+                        * UA upwards for a determination in the
+                        * completion functions
+                        */
+                       return SUCCESS;
+
                /* these three are not supported */
        case COPY_ABORTED:
        case VOLUME_OVERFLOW:
@@ -1751,6 +1777,14 @@ int scsi_error_handler(void *data)
                 * what we need to do to get it up and online again (if we can).
                 * If we fail, we end up taking the thing offline.
                 */
+               if (scsi_autopm_get_host(shost) != 0) {
+                       SCSI_LOG_ERROR_RECOVERY(1,
+                               printk(KERN_ERR "Error handler scsi_eh_%d "
+                                               "unable to autoresume\n",
+                                               shost->host_no));
+                       continue;
+               }
+
                if (shost->transportt->eh_strategy_handler)
                        shost->transportt->eh_strategy_handler(shost);
                else
@@ -1764,6 +1798,7 @@ int scsi_error_handler(void *data)
                 * which are still online.
                 */
                scsi_restart_operations(shost);
+               scsi_autopm_put_host(shost);
                set_current_state(TASK_INTERRUPTIBLE);
        }
        __set_current_state(TASK_RUNNING);
@@ -1861,12 +1896,16 @@ scsi_reset_provider_done_command(struct scsi_cmnd *scmd)
 int
 scsi_reset_provider(struct scsi_device *dev, int flag)
 {
-       struct scsi_cmnd *scmd = scsi_get_command(dev, GFP_KERNEL);
+       struct scsi_cmnd *scmd;
        struct Scsi_Host *shost = dev->host;
        struct request req;
        unsigned long flags;
        int rtn;
 
+       if (scsi_autopm_get_host(shost) < 0)
+               return FAILED;
+
+       scmd = scsi_get_command(dev, GFP_KERNEL);
        blk_rq_init(NULL, &req);
        scmd->request = &req;
 
@@ -1923,6 +1962,7 @@ scsi_reset_provider(struct scsi_device *dev, int flag)
        scsi_run_host_queues(shost);
 
        scsi_next_command(scmd);
+       scsi_autopm_put_host(shost);
        return rtn;
 }
 EXPORT_SYMBOL(scsi_reset_provider);