1 files changed, 16 insertions, 3 deletions

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 54a1ad5eef42..8d59914f2057 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3642,12 +3642,15 @@ static int run(mddev_t *mddev)
         }
 
         /* Ok, everything is just fine now */
-        sysfs_create_group(&mddev->kobj, &raid5_attrs_group);
+        if (sysfs_create_group(&mddev->kobj, &raid5_attrs_group))
+                printk(KERN_WARNING
+                       "raid5: failed to create sysfs attributes for %s\n",
+                       mdname(mddev));
 
         mddev->queue->unplug_fn = raid5_unplug_device;
         mddev->queue->issue_flush_fn = raid5_issue_flush;
-        mddev->queue->backing_dev_info.congested_fn = raid5_congested;
         mddev->queue->backing_dev_info.congested_data = mddev;
+        mddev->queue->backing_dev_info.congested_fn = raid5_congested;
 
         mddev->array_size =  mddev->size * (conf->previous_raid_disks -
                                             conf->max_degraded);
@@ -3678,6 +3681,7 @@ static int stop(mddev_t *mddev)
         mddev->thread = NULL;
         shrink_stripes(conf);
         kfree(conf->stripe_hashtbl);
+        mddev->queue->backing_dev_info.congested_fn = NULL;
         blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/
         sysfs_remove_group(&mddev->kobj, &raid5_attrs_group);
         kfree(conf->disks);
@@ -3950,7 +3954,12 @@ static int raid5_start_reshape(mddev_t *mddev)
                                 added_devices++;
                                 rdev->recovery_offset = 0;
                                 sprintf(nm, "rd%d", rdev->raid_disk);
-                                sysfs_create_link(&mddev->kobj, &rdev->kobj, nm);
+                                if (sysfs_create_link(&mddev->kobj,
+                                                      &rdev->kobj, nm))
+                                        printk(KERN_WARNING
+                                               "raid5: failed to create "
+                                               " link %s for %s\n",
+                                               nm, mdname(mddev));
                         } else
                                 break;
                 }
@@ -4104,6 +4113,10 @@ static struct mdk_personality raid4_personality =
         .spare_active   = raid5_spare_active,
         .sync_request   = sync_request,
         .resize         = raid5_resize,
+#ifdef CONFIG_MD_RAID5_RESHAPE
+        .check_reshape  = raid5_check_reshape,
+        .start_reshape  = raid5_start_reshape,
+#endif
         .quiesce        = raid5_quiesce,
 };