From 339c79f411254b3dc82873c2b489da819c01aeb0 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Tue, 1 Jun 2010 19:37:28 +1000
Subject: [PATCH] --- yaml --- r: 208371 b: refs/heads/master c:
 4a5add49951e698073011855d1a8a7306bc9308d h: refs/heads/master i:   208369:
 9e12b377e967deccd47070f9e4b34393e6d68bcc   208367:
 2b7e3a8c6ca967c632e82d91bf871b072cd3f5aa v: v3

---
 [refs]                   |  2 +-
 trunk/drivers/md/raid5.c | 32 +++++++++++++++++---------------
 2 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/[refs] b/[refs]
index 71e8fb17a620..292f12de56ed 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 768a418db102bb6aa6064e6090892b5c21ff1f9e
+refs/heads/master: 4a5add49951e698073011855d1a8a7306bc9308d
diff --git a/trunk/drivers/md/raid5.c b/trunk/drivers/md/raid5.c
index 6fa60e416a09..9c462f6659c3 100644
--- a/trunk/drivers/md/raid5.c
+++ b/trunk/drivers/md/raid5.c
@@ -5161,16 +5161,6 @@ static int run(mddev_t *mddev)
 							"reshape");
 	}
 
-	/* read-ahead size must cover two whole stripes, which is
-	 * 2 * (datadisks) * chunksize where 'n' is the number of raid devices
-	 */
-	{
-		int data_disks = conf->previous_raid_disks - conf->max_degraded;
-		int stripe = data_disks *
-			((mddev->chunk_sectors << 9) / PAGE_SIZE);
-		if (mddev->queue->backing_dev_info.ra_pages < 2 * stripe)
-			mddev->queue->backing_dev_info.ra_pages = 2 * stripe;
-	}
 
 	/* Ok, everything is just fine now */
 	if (mddev->to_remove == &raid5_attrs_group)
@@ -5178,8 +5168,23 @@ static int run(mddev_t *mddev)
 	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",
+		       "raid5: failed to create sysfs attributes for %s\n",
 		       mdname(mddev));
+	md_set_array_sectors(mddev, raid5_size(mddev, 0, 0));
+
+	if (mddev->queue) {
+		/* read-ahead size must cover two whole stripes, which
+		 * is 2 * (datadisks) * chunksize where 'n' is the
+		 * number of raid devices
+		 */
+		int data_disks = conf->previous_raid_disks - conf->max_degraded;
+		int stripe = data_disks *
+			((mddev->chunk_sectors << 9) / PAGE_SIZE);
+		if (mddev->queue->backing_dev_info.ra_pages < 2 * stripe)
+			mddev->queue->backing_dev_info.ra_pages = 2 * stripe;
+
+		blk_queue_merge_bvec(mddev->queue, raid5_mergeable_bvec);
+	}
 
 	mddev->queue->queue_lock = &conf->device_lock;
 
@@ -5187,9 +5192,6 @@ static int run(mddev_t *mddev)
 	mddev->queue->backing_dev_info.congested_data = mddev;
 	mddev->queue->backing_dev_info.congested_fn = raid5_congested;
 
-	md_set_array_sectors(mddev, raid5_size(mddev, 0, 0));
-
-	blk_queue_merge_bvec(mddev->queue, raid5_mergeable_bvec);
 	chunk_size = mddev->chunk_sectors << 9;
 	blk_queue_io_min(mddev->queue, chunk_size);
 	blk_queue_io_opt(mddev->queue, chunk_size *
@@ -5618,7 +5620,7 @@ static void end_reshape(raid5_conf_t *conf)
 		/* read-ahead size must cover two whole stripes, which is
 		 * 2 * (datadisks) * chunksize where 'n' is the number of raid devices
 		 */
-		{
+		if (conf->mddev->queue) {
 			int data_disks = conf->raid_disks - conf->max_degraded;
 			int stripe = data_disks * ((conf->chunk_sectors << 9)
 						   / PAGE_SIZE);