[PATCH] ASoC: core: add snd_BUG_ON() check in devm_snd_soc_register_card()

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@gmail.com>

card is dereferenced immediately, so passing NULL results in a NULL
pointer dereference. A NULL dev is silently accepted, defeating the
documented automatic-unregistration semantics of this devm variant.

Add snd_BUG_ON() checks on both arguments to catch API misuse early.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 sound/soc/soc-devres.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/soc-devres.c b/sound/soc/soc-devres.c
index 718165ba84ac..3e946196022a 100644
--- a/sound/soc/soc-devres.c
+++ b/sound/soc/soc-devres.c
@@ -59,6 +59,9 @@ EXPORT_SYMBOL_GPL(devm_snd_soc_register_component);
  */
 int devm_snd_soc_register_card(struct device *dev, struct snd_soc_card *card)
 {
+	if (snd_BUG_ON(!dev || !card))
+		return -EINVAL;
+
 	card->devres_dev = dev;
 	return snd_soc_register_card(card);
 }
-- 
2.43.0