[PATCH 2/2] ASoC: spacemit: init *dp to NULL before error paths

[phucduc.bui@gmail.com]

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

spacemit_i2s_init_dai() takes an optional output parameter dp, but only
assigns *dp on the success path. If devm_kmemdup() fails, *dp is left
untouched.
The current caller does check the return value before using dp, so this
isn't an active bug. Still, initialize *dp to NULL upfront as a defensive
measure, consistent with how core helpers like _snd_pcm_new() handle
their optional output parameters.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 sound/soc/spacemit/k1_i2s.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/spacemit/k1_i2s.c b/sound/soc/spacemit/k1_i2s.c
index 64510c9a1a89..23037fa4233c 100644
--- a/sound/soc/spacemit/k1_i2s.c
+++ b/sound/soc/spacemit/k1_i2s.c
@@ -382,6 +382,9 @@ static int spacemit_i2s_init_dai(struct spacemit_i2s_dev *i2s,
 	struct property *dma_names;
 	const char *dma_name;
 
+	if (dp)
+		*dp = NULL;
+
 	of_property_for_each_string(node, "dma-names", dma_names, dma_name) {
 		if (!strcmp(dma_name, "tx"))
 			i2s->has_playback = true;
-- 
2.43.0