ASoC: core: Fix obscure leak of runtime array

We're currently not freeing card->rtd in cases where the card is
unregistered before being instantiated - convert it to devm_kzalloc() to
make sure that happens.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 93a0daa..a4deebc 100644 (file)
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1686,7 +1686,6 @@ static int soc_cleanup_card_resources(struct snd_soc_card *card)
 
        snd_soc_dapm_free(&card->dapm);
 
-       kfree(card->rtd);
        snd_card_free(card->snd_card);
        return 0;
 
@@ -3112,9 +3111,10 @@ int snd_soc_register_card(struct snd_soc_card *card)
 
        soc_init_card_debugfs(card);
 
-       card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
-                           (card->num_links + card->num_aux_devs),
-                           GFP_KERNEL);
+       card->rtd = devm_kzalloc(card->dev,
+                                sizeof(struct snd_soc_pcm_runtime) *
+                                (card->num_links + card->num_aux_devs),
+                                GFP_KERNEL);
        if (card->rtd == NULL)
                return -ENOMEM;
        card->rtd_aux = &card->rtd[card->num_links];