md: correctly update sysfs when a raid1 is reshaped

[linux-2.6-omap-h63xx.git] / drivers / md / raid1.c

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index ea2a58d28871acd030c03eafbbf86824ca2a7751..f33a729960ca3f58e4fd618605ca1c197523ef11 100644 (file)
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2154,11 +2154,25 @@ static int raid1_reshape(mddev_t *mddev)
        oldpool = conf->r1bio_pool;
        conf->r1bio_pool = newpool;
 
-       for (d=d2=0; d < conf->raid_disks; d++)
-               if (conf->mirrors[d].rdev) {
-                       conf->mirrors[d].rdev->raid_disk = d2;
-                       newmirrors[d2++].rdev = conf->mirrors[d].rdev;
+       for (d = d2 = 0; d < conf->raid_disks; d++) {
+               mdk_rdev_t *rdev = conf->mirrors[d].rdev;
+               if (rdev && rdev->raid_disk != d2) {
+                       char nm[20];
+                       sprintf(nm, "rd%d", rdev->raid_disk);
+                       sysfs_remove_link(&mddev->kobj, nm);
+                       rdev->raid_disk = d2;
+                       sprintf(nm, "rd%d", rdev->raid_disk);
+                       sysfs_remove_link(&mddev->kobj, nm);
+                       if (sysfs_create_link(&mddev->kobj,
+                                             &rdev->kobj, nm))
+                               printk(KERN_WARNING
+                                      "md/raid1: cannot register "
+                                      "%s for %s\n",
+                                      nm, mdname(mddev));
                }
+               if (rdev)
+                       newmirrors[d2++].rdev = rdev;
+       }
        kfree(conf->mirrors);
        conf->mirrors = newmirrors;
        kfree(conf->poolinfo);