md: reduce dependence on sysfs.

We will want md devices to live as dm targets where sysfs is not
visible.  So allow md to not connect to sysfs.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 3 insertions, 5 deletions

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 96c690279fc6..6a7a30113161 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5158,7 +5158,8 @@ static int run(mddev_t *mddev)
         /* Ok, everything is just fine now */
         if (mddev->to_remove == &raid5_attrs_group)
                 mddev->to_remove = NULL;
-        else if (sysfs_create_group(&mddev->kobj, &raid5_attrs_group))
+        else if (mddev->kobj.sd &&
+            sysfs_create_group(&mddev->kobj, &raid5_attrs_group))
                 printk(KERN_WARNING
                        "md/raid:%s: failed to create sysfs attributes.\n",
                        mdname(mddev));
@@ -5545,10 +5546,7 @@ static int raid5_start_reshape(mddev_t *mddev)
                                 sprintf(nm, "rd%d", rdev->raid_disk);
                                 if (sysfs_create_link(&mddev->kobj,
                                                       &rdev->kobj, nm))
-                                        printk(KERN_WARNING
-                                               "md/raid:%s: failed to create "
-                                               " link %s\n",
-                                               mdname(mddev), nm);
+                                        /* Failure here is OK */;
                         } else
                                 break;
                 }