diff options
Diffstat (limited to '')
| -rw-r--r-- | kernel/trace/blktrace.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index 5ef0484513ec..5a88a6b55933 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -483,6 +483,8 @@ static int do_blk_trace_setup(struct request_queue *q, char *name, dev_t dev, struct dentry *dir = NULL; int ret; + lockdep_assert_held(&q->blk_trace_mutex); + if (!buts->buf_size || !buts->buf_nr) return -EINVAL; |