Merge tag 'md/4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

Pull MD updates from Shaohua Li:
 "This update mainly fixes bugs.

   - a raid5 discard related fix from Jes
   - a MD multipath bio clone fix from Ming
   - raid1 error handling deadlock fix from Nate and corresponding
     raid10 fix from myself
   - a raid5 stripe batch fix from Neil
   - a patch from Sebastian to avoid unnecessary uevent
   - several cleanup/debug patches"

* tag 'md/4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  md/raid5: Cleanup cpu hotplug notifier
  raid10: include bio_end_io_list in nr_queued to prevent freeze_array hang
  raid1: include bio_end_io_list in nr_queued to prevent freeze_array hang
  md: fix typos for stipe
  md/bitmap: remove redundant return in bitmap_checkpage
  md/raid1: remove unnecessary BUG_ON
  md: multipath: don't hardcopy bio in .make_request path
  md/raid5: output stripe state for debug
  md/raid5: preserve STRIPE_PREREAD_ACTIVE in break_stripe_batch_list
  Update MD git tree URL
  md/bitmap: remove redundant check
  MD: warn for potential deadlock
  md: Drop sending a change uevent when stopping
  RAID5: revert e9e4c377e2f563 to fix a livelock
  RAID5: check_reshape() shouldn't call mddev_suspend
  md/raid5: Compare apples to apples (or sectors to sectors)

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 4e3843f..39fb21e 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2274,6 +2274,7 @@ static void handle_write_finished(struct r1conf *conf, struct r1bio *r1_bio)
 	if (fail) {
 		spin_lock_irq(&conf->device_lock);
 		list_add(&r1_bio->retry_list, &conf->bio_end_io_list);
+		conf->nr_queued++;
 		spin_unlock_irq(&conf->device_lock);
 		md_wakeup_thread(conf->mddev->thread);
 	} else {
@@ -2391,8 +2392,10 @@ static void raid1d(struct md_thread *thread)
 		LIST_HEAD(tmp);
 		spin_lock_irqsave(&conf->device_lock, flags);
 		if (!test_bit(MD_CHANGE_PENDING, &mddev->flags)) {
-			list_add(&tmp, &conf->bio_end_io_list);
-			list_del_init(&conf->bio_end_io_list);
+			while (!list_empty(&conf->bio_end_io_list)) {
+				list_move(conf->bio_end_io_list.prev, &tmp);
+				conf->nr_queued--;
+			}
 		}
 		spin_unlock_irqrestore(&conf->device_lock, flags);
 		while (!list_empty(&tmp)) {
@@ -2695,7 +2698,6 @@ static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
 			    !conf->fullsync &&
 			    !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery))
 				break;
-			BUG_ON(sync_blocks < (PAGE_SIZE>>9));
 			if ((len >> 9) > sync_blocks)
 				len = sync_blocks<<9;
 		}