From: NeilBrown <neilb@suse.de>
Date: Mon, 13 Feb 2012 03:24:05 +0000 (+1100)
Subject: md/raid1: fix buglet in md_raid1_contested.
X-Git-Tag: Ubuntu-5.2.0-15.16~18612^2~2
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=f53e29fc87b6fb76db0043202ec2c3450caa5ff3;p=mirror_ubuntu-eoan-kernel.git

md/raid1: fix buglet in md_raid1_contested.

Since we added 'replacement' capability, RAID1 can have twice
as many devices as ->raid_disks indicates.
So md_raid1_congested needs to check that many possible devices,
not just ->raid_disks many.

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

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index a368db2431a5..a0b225eb4ac4 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -624,7 +624,7 @@ int md_raid1_congested(struct mddev *mddev, int bits)
 		return 1;
 
 	rcu_read_lock();
-	for (i = 0; i < conf->raid_disks; i++) {
+	for (i = 0; i < conf->raid_disks * 2; i++) {
 		struct md_rdev *rdev = rcu_dereference(conf->mirrors[i].rdev);
 		if (rdev && !test_bit(Faulty, &rdev->flags)) {
 			struct request_queue *q = bdev_get_queue(rdev->bdev);