From: Stefan Behrens Date: Wed, 11 Sep 2013 07:59:22 +0000 (+0200) Subject: Btrfs: add the missing mutex unlock in write_all_supers() X-Git-Tag: v3.12-rc2~5^2~7 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a724b4369097897db45d61108c0e976912e586c7;p=platform%2Fkernel%2Flinux-stable.git Btrfs: add the missing mutex unlock in write_all_supers() The BUG() was replaced by btrfs_error() and return -EIO with the patch "get rid of one BUG() in write_all_supers()", but the missing mutex_unlock() was overlooked. The 0-DAY kernel build service from Intel reported the missing unlock which was found by the coccinelle tool: fs/btrfs/disk-io.c:3422:2-8: preceding lock on line 3374 Signed-off-by: Stefan Behrens Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 72cf08b..4ae17ed 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -3416,6 +3416,7 @@ static int write_all_supers(struct btrfs_root *root, int max_mirrors) if (total_errors > max_errors) { printk(KERN_ERR "btrfs: %d errors while writing supers\n", total_errors); + mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); /* FUA is masked off if unsupported and can't be the reason */ btrfs_error(root->fs_info, -EIO,