From 750dc2f622192c08664a15413bc9746d9cbc4361 Mon Sep 17 00:00:00 2001
From: Rob Clark <robdclark@chromium.org>
Date: Wed, 17 Nov 2021 17:04:53 -0800
Subject: [PATCH] ASoC: rt5682s: Fix crash due to out of scope stack vars
Git-commit: 750dc2f622192c08664a15413bc9746d9cbc4361
Patch-mainline: v5.16-rc5
References: jsc#PED-850

Move the declaration of temporary arrays to somewhere that won't go out
of scope before the devm_clk_hw_register() call, lest we be at the whim
of the compiler for whether those stack variables get overwritten.

Fixes a crash seen with gcc version 11.2.1 20210728 (Red Hat 11.2.1-1)

Fixes: bdd229ab26be ("ASoC: rt5682s: Add driver for ALC5682I-VS codec")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20211118010453.843286-2-robdclark@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/codecs/rt5682s.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/sound/soc/codecs/rt5682s.c b/sound/soc/codecs/rt5682s.c
index 470957fcad6b..d49a4f68566d 100644
--- a/sound/soc/codecs/rt5682s.c
+++ b/sound/soc/codecs/rt5682s.c
@@ -2693,6 +2693,8 @@ static int rt5682s_register_dai_clks(struct snd_soc_component *component)
 
 	for (i = 0; i < RT5682S_DAI_NUM_CLKS; ++i) {
 		struct clk_init_data init = { };
+		struct clk_parent_data parent_data;
+		const struct clk_hw *parent;
 
 		dai_clk_hw = &rt5682s->dai_clks_hw[i];
 
@@ -2700,17 +2702,17 @@ static int rt5682s_register_dai_clks(struct snd_soc_component *component)
 		case RT5682S_DAI_WCLK_IDX:
 			/* Make MCLK the parent of WCLK */
 			if (rt5682s->mclk) {
-				init.parent_data = &(struct clk_parent_data){
+				parent_data = (struct clk_parent_data){
 					.fw_name = "mclk",
 				};
+				init.parent_data = &parent_data;
 				init.num_parents = 1;
 			}
 			break;
 		case RT5682S_DAI_BCLK_IDX:
 			/* Make WCLK the parent of BCLK */
-			init.parent_hws = &(const struct clk_hw *){
-				&rt5682s->dai_clks_hw[RT5682S_DAI_WCLK_IDX]
-			};
+			parent = &rt5682s->dai_clks_hw[RT5682S_DAI_WCLK_IDX];
+			init.parent_hws = &parent;
 			init.num_parents = 1;
 			break;
 		default:
-- 
2.35.3