md: fix up plugging (again).

[deliverable/linux.git] / drivers / md / raid1.c

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index a9c7981ddd245c6955cbed390b617a9172abde31..8c2754f835ef89a99d247719d2d114f6fba30b13 100644 (file)
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -517,8 +517,8 @@ static int read_balance(struct r1conf *conf, struct r1bio *r1_bio, int *max_sect
                int bad_sectors;
 
                int disk = start_disk + i;
-               if (disk >= conf->raid_disks)
-                       disk -= conf->raid_disks;
+               if (disk >= conf->raid_disks * 2)
+                       disk -= conf->raid_disks * 2;
 
                rdev = rcu_dereference(conf->mirrors[disk].rdev);
                if (r1_bio->bios[disk] == IO_BLOCKED
@@ -883,7 +883,6 @@ static void make_request(struct mddev *mddev, struct bio * bio)
        const unsigned long do_sync = (bio->bi_rw & REQ_SYNC);
        const unsigned long do_flush_fua = (bio->bi_rw & (REQ_FLUSH | REQ_FUA));
        struct md_rdev *blocked_rdev;
-       int plugged;
        int first_clone;
        int sectors_handled;
        int max_sectors;
@@ -1034,7 +1033,6 @@ read_again:
         * the bad blocks.  Each set of writes gets it's own r1bio
         * with a set of bios attached.
         */
-       plugged = mddev_check_plugged(mddev);
 
        disks = conf->raid_disks * 2;
  retry_write:
@@ -1191,6 +1189,8 @@ read_again:
                bio_list_add(&conf->pending_bio_list, mbio);
                conf->pending_count++;
                spin_unlock_irqrestore(&conf->device_lock, flags);
+               if (!mddev_check_plugged(mddev))
+                       md_wakeup_thread(mddev->thread);
        }
        /* Mustn't call r1_bio_write_done before this next test,
         * as it could result in the bio being freed.
@@ -1213,9 +1213,6 @@ read_again:
 
        /* In case raid1d snuck in to freeze_array */
        wake_up(&conf->wait_barrier);
-
-       if (do_sync || !bitmap || !plugged)
-               md_wakeup_thread(mddev->thread);
 }
 
 static void status(struct seq_file *seq, struct mddev *mddev)
@@ -2621,7 +2618,7 @@ static struct r1conf *setup_conf(struct mddev *mddev)
                goto abort;
        }
        err = -ENOMEM;
-       conf->thread = md_register_thread(raid1d, mddev, NULL);
+       conf->thread = md_register_thread(raid1d, mddev, "raid1");
        if (!conf->thread) {
                printk(KERN_ERR
                       "md/raid1:%s: couldn't allocate thread\n",