ASoC: core: check of_property_count_strings failure

Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org

1 files changed, 3 insertions, 3 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 3a4e93e52b6d..b390f00b4e99 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3631,10 +3631,10 @@ int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
         int i, ret;
 
         num_routes = of_property_count_strings(np, propname);
-        if (num_routes & 1) {
+        if (num_routes < 0 || num_routes & 1) {
                 dev_err(card->dev,
-                        "Property '%s's length is not even\n",
-                        propname);
+                     "Property '%s' does not exist or its length is not even\n",
+                     propname);
                 return -EINVAL;
         }
         num_routes /= 2;