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Subject[PATCH 1/2] ASoC: rt5682: Fix crash due to out of scope stack vars
Date
From: Rob Clark <robdclark@chromium.org>

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: edbd24ea1e5c ("ASoC: rt5682: Drop usage of __clk_get_name()")
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
sound/soc/codecs/rt5682.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/sound/soc/codecs/rt5682.c b/sound/soc/codecs/rt5682.c
index 78b4cb5fb6c8..0d59ec2a5460 100644
--- a/sound/soc/codecs/rt5682.c
+++ b/sound/soc/codecs/rt5682.c
@@ -2844,6 +2844,8 @@ int rt5682_register_dai_clks(struct rt5682_priv *rt5682)

for (i = 0; i < RT5682_DAI_NUM_CLKS; ++i) {
struct clk_init_data init = { };
+ struct clk_parent_data parent_data;
+ const struct clk_hw *parent;

dai_clk_hw = &rt5682->dai_clks_hw[i];

@@ -2851,17 +2853,17 @@ int rt5682_register_dai_clks(struct rt5682_priv *rt5682)
case RT5682_DAI_WCLK_IDX:
/* Make MCLK the parent of WCLK */
if (rt5682->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 RT5682_DAI_BCLK_IDX:
/* Make WCLK the parent of BCLK */
- init.parent_hws = &(const struct clk_hw *){
- &rt5682->dai_clks_hw[RT5682_DAI_WCLK_IDX]
- };
+ parent = &rt5682->dai_clks_hw[RT5682_DAI_WCLK_IDX];
+ init.parent_hws = &parent;
init.num_parents = 1;
break;
default:
--
2.33.1
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