Btrfs: fix wrong write range for filemap_fdatawrite_range()

filemap_fdatawrite_range() expect the third arg to be @end
not @len, fix it.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 33c0518..73fadc7 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7533,7 +7533,8 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
        count = iov_iter_count(iter);
        if (test_bit(BTRFS_INODE_HAS_ASYNC_EXTENT,
                     &BTRFS_I(inode)->runtime_flags))
-               filemap_fdatawrite_range(inode->i_mapping, offset, count);
+               filemap_fdatawrite_range(inode->i_mapping, offset,
+                                        offset + count - 1);
 
        if (rw & WRITE) {
                /*