blktrace: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Jens Axboe <axboe@kernel.dk>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-block@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index e1c6d79fb4cc9f951a524c4535d7c8ee64282a14..2d6e93ab04783452c7ddd979c65ca83d51256da2 100644 (file)
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -512,8 +512,6 @@ static int do_blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
        dir = debugfs_lookup(buts->name, blk_debugfs_root);
        if (!dir)
                bt->dir = dir = debugfs_create_dir(buts->name, blk_debugfs_root);
-       if (!dir)
-               goto err;
 
        bt->dev = dev;
        atomic_set(&bt->dropped, 0);
@@ -522,12 +520,8 @@ static int do_blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
        ret = -EIO;
        bt->dropped_file = debugfs_create_file("dropped", 0444, dir, bt,
                                               &blk_dropped_fops);
-       if (!bt->dropped_file)
-               goto err;
 
        bt->msg_file = debugfs_create_file("msg", 0222, dir, bt, &blk_msg_fops);
-       if (!bt->msg_file)
-               goto err;
 
        bt->rchan = relay_open("trace", dir, buts->buf_size,
                                buts->buf_nr, &blk_relay_callbacks, bt);