commit 0a3404dcff29a7589e8d6ce8c36f97c5411f85b4
author Miao Xie <miaox@cn.fujitsu.com> Mon Jan 28 12:34:55 2013 +0000
committer Josef Bacik <jbacik@fusionio.com> Tue Feb 05 16:09:10 2013 -0500
tree 14531ce5b4c7fe080847590237b6c97b57f69edb
parent 222c81dc3874b4fe98371be665d0447a36447653

Btrfs: fix wrong sync_writers decrement in btrfs_file_aio_write()

If the checks at the beginning of btrfs_file_aio_write() fail, we needn't
decrease ->sync_writers, because we have not increased it. Fix it.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>

fs/btrfs/file.c

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 841cfe3..a902faa 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1595,9 +1595,10 @@
 		if (err < 0 && num_written > 0)
 			num_written = err;
 	}
-out:
+
 	if (sync)
 		atomic_dec(&BTRFS_I(inode)->sync_writers);
+out:
 	sb_end_write(inode->i_sb);
 	current->backing_dev_info = NULL;
 	return num_written ? num_written : err;