Merge tag 'md-7.0-20260127' of git://git.kernel.org/pub/scm/linux/kernel/git/mdraid/linux into for-7.0/block

Pull MD updates from Yu:

"Bug Fixes:
 - Fix raid5_run() to return error when log_init() fails (Yu Kuai)
 - Fix IO hang with degraded array with llbitmap (Yu Kuai)
 - Fix percpu_ref not resurrected on suspend timeout in llbitmap
   (Yu Kuai)
 - Fix GPF in write_page caused by resize race (Jack Wang)
 - Fix NULL pointer dereference in process_metadata_update
   (Jiasheng Jiang)
 - Fix hang when stopping arrays with metadata through dm-raid
   (Heinz Mauelshagen)
 - Fix any_working flag handling in raid10_sync_request (Li Nan)

 Cleanups & Refactoring:
 - Refactor sync/recovery code path, improve error handling for
   badblocks, and remove unused recovery_disabled field (Li Nan)
 - Consolidate mddev boolean fields into mddev_flags (Yu Kuai)

 Improvements:
 - Use mempool to allocate stripe_request_ctx and make sure max_sectors
   is not less than io_opt in raid5 (Yu Kuai)"

* tag 'md-7.0-20260127' of git://git.kernel.org/pub/scm/linux/kernel/git/mdraid/linux: (23 commits)
  md raid: fix hang when stopping arrays with metadata through dm-raid
  md-cluster: fix NULL pointer dereference in process_metadata_update
  md/bitmap: fix GPF in write_page caused by resize race
  md/md-llbitmap: fix percpu_ref not resurrected on suspend timeout
  md/raid5: fix IO hang with degraded array with llbitmap
  md: remove recovery_disabled
  md/raid10: cleanup skip handling in raid10_sync_request
  md/raid10: fix any_working flag handling in raid10_sync_request
  md: move finish_reshape to md_finish_sync()
  md: factor out sync completion update into helper
  md: remove MD_RECOVERY_ERROR handling and simplify resync_offset update
  md: update curr_resync_completed even when MD_RECOVERY_INTR is set
  md: mark rdev Faulty when badblocks setting fails
  md: break remaining operations on badblocks set failure in narrow_write_error
  md/raid1,raid10: support narrow_write_error when badblocks is disabled
  md: factor error handling out of md_done_sync into helper
  md/raid1: simplify uptodate handling in end_sync_write
  md/raid5: make sure max_sectors is not less than io_opt
  md/raid5: use mempool to allocate stripe_request_ctx
  md: merge mddev serialize_policy into mddev_flags
  ...

Author: axboe

drivers/md/md-bitmap.c

@@ -2085,7 +2085,7 @@ static void bitmap_destroy(struct mddev *mddev)
 		return;
 
 	bitmap_wait_behind_writes(mddev);
-	if (!mddev->serialize_policy)
+	if (!test_bit(MD_SERIALIZE_POLICY, &mddev->flags))
 		mddev_destroy_serial_pool(mddev, NULL);
 
 	mutex_lock(&mddev->bitmap_info.mutex);
@@ -2453,6 +2453,7 @@ static int __bitmap_resize(struct bitmap *bitmap, sector_t blocks,
 		memcpy(page_address(store.sb_page),
 		       page_address(bitmap->storage.sb_page),
 		       sizeof(bitmap_super_t));
+	mutex_lock(&bitmap->mddev->bitmap_info.mutex);
 	spin_lock_irq(&bitmap->counts.lock);
 	md_bitmap_file_unmap(&bitmap->storage);
 	bitmap->storage = store;
@@ -2560,7 +2561,7 @@ static int __bitmap_resize(struct bitmap *bitmap, sector_t blocks,
 			set_page_attr(bitmap, i, BITMAP_PAGE_DIRTY);
 	}
 	spin_unlock_irq(&bitmap->counts.lock);
-
+	mutex_unlock(&bitmap->mddev->bitmap_info.mutex);
 	if (!init) {
 		__bitmap_unplug(bitmap);
 		bitmap->mddev->pers->quiesce(bitmap->mddev, 0);
@@ -2809,7 +2810,7 @@ backlog_store(struct mddev *mddev, const char *buf, size_t len)
 	mddev->bitmap_info.max_write_behind = backlog;
 	if (!backlog && mddev->serial_info_pool) {
 		/* serial_info_pool is not needed if backlog is zero */
-		if (!mddev->serialize_policy)
+		if (!test_bit(MD_SERIALIZE_POLICY, &mddev->flags))
 			mddev_destroy_serial_pool(mddev, NULL);
 	} else if (backlog && !mddev->serial_info_pool) {
 		/* serial_info_pool is needed since backlog is not zero */

drivers/md/md-cluster.c

@@ -549,8 +549,13 @@ static void process_metadata_update(struct mddev *mddev, struct cluster_msg *msg
 
 	dlm_lock_sync(cinfo->no_new_dev_lockres, DLM_LOCK_CR);
 
-	/* daemaon thread must exist */
 	thread = rcu_dereference_protected(mddev->thread, true);
+	if (!thread) {
+		pr_warn("md-cluster: Received metadata update but MD thread is not ready\n");
+		dlm_unlock_sync(cinfo->no_new_dev_lockres);
+		return;
+	}
+
 	wait_event(thread->wqueue,
 		   (got_lock = mddev_trylock(mddev)) ||
 		    test_bit(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD, &cinfo->state));

drivers/md/md-llbitmap.c

@@ -712,8 +712,10 @@ static int llbitmap_suspend_timeout(struct llbitmap *llbitmap, int page_idx)
 	percpu_ref_kill(&pctl->active);
 
 	if (!wait_event_timeout(pctl->wait, percpu_ref_is_zero(&pctl->active),
-			llbitmap->mddev->bitmap_info.daemon_sleep * HZ))
+			llbitmap->mddev->bitmap_info.daemon_sleep * HZ)) {
+		percpu_ref_resurrect(&pctl->active);
 		return -ETIMEDOUT;
+	}
 
 	return 0;
 }