ASoC: soc-topology: use devm_snd_soc_register_dai()

Use devm_ to avoid use-after-free KASAN reports and simplify error
handling.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
BugLink: https://github.com/thesofproject/linux/issues/2186
Link: https://lore.kernel.org/r/20200612205938.26415-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c
index 9e89633..43e5745 100644 (file)
--- a/sound/soc/soc-topology.c
+++ b/sound/soc/soc-topology.c
@@ -1851,7 +1851,7 @@ static int soc_tplg_dai_create(struct soc_tplg *tplg,
        list_add(&dai_drv->dobj.list, &tplg->comp->dobj_list);
 
        /* register the DAI to the component */
-       dai = snd_soc_register_dai(tplg->comp, dai_drv, false);
+       dai = devm_snd_soc_register_dai(tplg->comp->dev, tplg->comp, dai_drv, false);
        if (!dai)
                return -ENOMEM;
 
@@ -1859,7 +1859,6 @@ static int soc_tplg_dai_create(struct soc_tplg *tplg,
        ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
        if (ret != 0) {
                dev_err(dai->dev, "Failed to create DAI widgets %d\n", ret);
-               snd_soc_unregister_dai(dai);
                return ret;
        }