[alsa-devel] [PATCH 6/6] topology: tplg_elem_lookup() checks parameter before searching

From: Mengdong Lin mengdong.lin@linux.intel.com

Check the parameters at first in case of misuse.

Signed-off-by: Mengdong Lin mengdong.lin@linux.intel.com

diff --git a/src/topology/elem.c b/src/topology/elem.c index 029c9ab..724bf26 100644 --- a/src/topology/elem.c +++ b/src/topology/elem.c @@ -111,6 +111,9 @@ struct tplg_elem *tplg_elem_lookup(struct list_head *base, const char* id, struct list_head *pos; struct tplg_elem *elem;

+ if (!base || !id) + return NULL; + list_for_each(pos, base) {

elem = list_entry(pos, struct tplg_elem, list);