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ASoC: sigmadsp: Use flexible array for control cache

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Allocate SigmaDSP controls with kzalloc_flex() for the trailing
cache data instead of open-coding the size calculation.

Annotate the cache array with its existing byte count so the allocation
helper can initialize the counter.

Assisted-by: Codex:GPT-5.5
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20260511230351.28868-1-rosenp@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Rosen Penev 2026-05-11 16:03:51 -07:00 committed by Mark Brown
parent fea3df9eab
commit e0014849e9
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GPG Key ID: 24D68B725D5487D0
1 changed files with 2 additions and 2 deletions
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4
sound/soc/codecs/sigmadsp.c
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@ -35,7 +35,7 @@ struct sigmadsp_control {
struct snd_kcontrol *kcontrol;
bool is_readback;
bool cached;
uint8_t cache[];
u8 cache[] __counted_by(num_bytes);
};
struct sigmadsp_data {
@ -223,7 +223,7 @@ static int sigma_fw_load_control(struct sigmadsp *sigmadsp,
return -EINVAL;
num_bytes = le16_to_cpu(ctrl_chunk->num_bytes);
ctrl = kzalloc(sizeof(*ctrl) + num_bytes, GFP_KERNEL);
ctrl = kzalloc_flex(*ctrl, cache, num_bytes);
if (!ctrl)
return -ENOMEM;