file->f_op is never NULL...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index 3f1128b..ebab147 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -271,7 +271,7 @@
 
 static inline int autofs_prepare_pipe(struct file *pipe)
 {
-	if (!pipe->f_op || !pipe->f_op->write)
+	if (!pipe->f_op->write)
 		return -EINVAL;
 	if (!S_ISFIFO(file_inode(pipe)->i_mode))
 		return -EINVAL;