Patch "md/raid10: wait up frozen array in handle_write_completed" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

md/raid10: wait up frozen array in handle_write_completed

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
md-raid10-wait-up-frozen-array-in-handle_write_completed.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Guoqing Jiang <[email protected]>
Date: Mon, 17 Apr 2017 17:11:05 +0800
Subject: md/raid10: wait up frozen array in handle_write_completed

From: Guoqing Jiang <[email protected]>

[ Upstream commit cf25ae78fc50010f66b9be945017796da34c434d ]

Since nr_queued is changed, we need to call wake_up here if the array is already frozen and waiting for condition "nr_pending == nr_queued + extra" to be true.

And commit 824e47daddbf ("RAID1: avoid unnecessary spin locks in I/O barrier code") which has already added the wake_up for raid1.

---
 drivers/md/raid10.c |    5 +++++
 1 file changed, 5 insertions(+)

@@ -2704,6 +2704,11 @@ static void handle_write_completed(struc
 			list_add(&r10_bio->retry_list, &conf->bio_end_io_list);
 			conf->nr_queued++;
 			spin_unlock_irq(&conf->device_lock);
+			/*
+			 * In case freeze_array() is waiting for condition
+			 * nr_pending == nr_queued + extra to be true.
+			 */
+			wake_up(&conf->wait_barrier);
 			md_wakeup_thread(conf->mddev->thread);
 		} else {
 			if (test_bit(R10BIO_WriteError,

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/md-raid10-wait-up-frozen-array-in-handle_write_completed.patch queue-4.9/md-raid10-skip-spare-disk-as-first-disk.patch