Btrfs: don't use src fd for printk

commit c79b4713304f812d3d6c95826fc3e5fc2c0b0c14 upstream.

The fd we pass in may not be on a btrfs file system, so don't try to do
BTRFS_I() on it.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index f07d01bc4875e594b4847567a112b13733ef7252..bfcd87ee8ff543ad6da1d2c8a9da903ef0ad3758 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1648,7 +1648,7 @@ static noinline int btrfs_ioctl_snap_create_transid(struct file *file,
 
                src_inode = file_inode(src.file);
                if (src_inode->i_sb != file_inode(file)->i_sb) {
-                       btrfs_info(BTRFS_I(src_inode)->root->fs_info,
+                       btrfs_info(BTRFS_I(file_inode(file))->root->fs_info,
                                   "Snapshot src from another FS");
                        ret = -EXDEV;
                } else if (!inode_owner_or_capable(src_inode)) {