md/raid1: fix confusing 'redirect sector' message.

This message seems to suggest the named device is the one on which a
read failed, however it is actually the device that the read will be
redirected to.
So make the message a little clearer.

Reported-by: Tim Burgess <ozburgess@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>

drivers/md/raid1.c

@@ -1689,10 +1689,10 @@ static void raid1d(mddev_t *mddev)
 				r1_bio->bios[r1_bio->read_disk] = bio;
 				rdev = conf->mirrors[disk].rdev;
 				if (printk_ratelimit())
-					printk(KERN_ERR "raid1: %s: redirecting sector %llu to"
+					printk(KERN_ERR "raid1: redirecting sector %llu to"
-					       " another mirror\n",
+					       " other mirror: %s\n",
-					       bdevname(rdev->bdev,b),
+					       (unsigned long long)r1_bio->sector,
-					       (unsigned long long)r1_bio->sector);
+					       bdevname(rdev->bdev,b));
 				bio->bi_sector = r1_bio->sector + rdev->data_offset;
 				bio->bi_bdev = rdev->bdev;
 				bio->bi_end_io = raid1_end_read_request;