Patch "Btrfs: remove root_log_ctx from ctx list before btrfs_sync_log returns" has been added to the 4.7-stable tree

Patch "Btrfs: remove root_log_ctx from ctx list before btrfs_sync_log returns" has been added to the 4.7-stable tree

[gregkh]

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

    Btrfs: remove root_log_ctx from ctx list before btrfs_sync_log returns

to the 4.7-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:
     btrfs-remove-root_log_ctx-from-ctx-list-before-btrfs_sync_log-returns.patch
and it can be found in the queue-4.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From cbd60aa7cd17d81a434234268c55192862147439 Mon Sep 17 00:00:00 2001
From: Chris Mason <clm@fb.com>
Date: Tue, 6 Sep 2016 05:37:40 -0700
Subject: Btrfs: remove root_log_ctx from ctx list before btrfs_sync_log returns

From: Chris Mason <clm@fb.com>

commit cbd60aa7cd17d81a434234268c55192862147439 upstream.

We use a btrfs_log_ctx structure to pass information into the
tree log commit, and get error values out.  It gets added to a per
log-transaction list which we walk when things go bad.

Commit d1433debe added an optimization to skip waiting for the log
commit, but didn't take root_log_ctx out of the list.  This
patch makes sure we remove things before exiting.

Signed-off-by: Chris Mason <clm@fb.com>
Fixes: d1433debe7f4346cf9fc0dafc71c3137d2a97bc4
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/btrfs/tree-log.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -2851,6 +2851,7 @@ int btrfs_sync_log(struct btrfs_trans_ha
 
 	if (log_root_tree->log_transid_committed >= root_log_ctx.log_transid) {
 		blk_finish_plug(&plug);
+		list_del_init(&root_log_ctx.list);
 		mutex_unlock(&log_root_tree->log_mutex);
 		ret = root_log_ctx.log_ret;
 		goto out;


Patches currently in stable-queue which might be from clm@fb.com are

queue-4.7/btrfs-remove-root_log_ctx-from-ctx-list-before-btrfs_sync_log-returns.patch