From: NeilBrown <neilb@suse.de>
Date: Thu, 13 Aug 2009 00:41:49 +0000 (+1000)
Subject: md/raid5: Properly remove excess drives after shrinking a raid5/6
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1a67dde0abba36421a1257d01ba9de2f6d1c160a;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

md/raid5: Properly remove excess drives after shrinking a raid5/6

We were removing the drives, from the array, but not
removing symlinks from /sys/.... and not marking the device
as having been removed.

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

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 94a74cb5cccb..b8a2c5dc67ba 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5097,8 +5097,15 @@ static void raid5_finish_reshape(mddev_t *mddev)
 					mddev->degraded--;
 			for (d = conf->raid_disks ;
 			     d < conf->raid_disks - mddev->delta_disks;
-			     d++)
-				raid5_remove_disk(mddev, d);
+			     d++) {
+				mdk_rdev_t *rdev = conf->disks[d].rdev;
+				if (rdev && raid5_remove_disk(mddev, d) == 0) {
+					char nm[20];
+					sprintf(nm, "rd%d", rdev->raid_disk);
+					sysfs_remove_link(&mddev->kobj, nm);
+					rdev->raid_disk = -1;
+				}
+			}
 		}
 		mddev->layout = conf->algorithm;
 		mddev->chunk_sectors = conf->chunk_sectors;