From: Josef Bacik <jbacik@fusionio.com>
Date: Fri, 18 Oct 2013 16:10:36 +0000 (-0400)
Subject: Btrfs: release path before starting transaction in can_nocow_extent
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1bda19eb73d68b304148e67253e47cef049a419d;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

Btrfs: release path before starting transaction in can_nocow_extent

We can't be holding tree locks while we try to start a transaction, we will
deadlock.  Thanks,

Reported-by: Sage Weil <sage@inktank.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
---

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 3b4ffaf0cd52..f4a6851e6c88 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -6437,6 +6437,7 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
 
 	if (btrfs_extent_readonly(root, disk_bytenr))
 		goto out;
+	btrfs_release_path(path);
 
 	/*
 	 * look for other files referencing this extent, if we