Re: [PATCH] ASoC: tegra: ADX: convert map to flexible array

[Rosen Penev]

On Tue Aug 18, 2026 at 4:04 AM PDT, Thierry Reding wrote:
> On Fri, Aug 14, 2026 at 01:50:18PM -0700, Rosen Penev wrote:
>> Replace the pointer-based map allocation with a flexible array
>> member and use struct_size() for allocation. This simplifies
>> the code and avoid an extra allocation.
>>
>> Assisted-by: opencode:big-pickle
>> Signed-off-by: Rosen Penev <rosenp@xxxxxxxxx>
>> ---
>>  sound/soc/tegra/tegra210_adx.c | 12 ++++--------
>>  sound/soc/tegra/tegra210_adx.h |  2 +-
>>  2 files changed, 5 insertions(+), 9 deletions(-)
>>
>> diff --git a/sound/soc/tegra/tegra210_adx.c b/sound/soc/tegra/tegra210_adx.c
>> index 9175598b52a7..d607ba4233b6 100644
>> --- a/sound/soc/tegra/tegra210_adx.c
>> +++ b/sound/soc/tegra/tegra210_adx.c
>> @@ -677,11 +677,13 @@ static int tegra210_adx_platform_probe(struct platform_device *pdev)
>>  	void __iomem *regs;
>>  	int err, i;
>>
>> -	adx = devm_kzalloc(dev, sizeof(*adx), GFP_KERNEL);
>> +	soc_data = of_device_get_match_data(dev);
>> +	adx = devm_kzalloc(dev,
>> +			   struct_size(adx, map, soc_data->ram_depth * TEGRA_ADX_SLOTS_PER_WORD),
>> +			   GFP_KERNEL);
>
> This is slightly hideous. Maybe add a temporary "count" variable for
> readability?
The reason for this is to allow a treewide conversion of this when
devm_kzalloc_flex() gets introduced.
>
> Either way, though, this looks correct:
>
> Reviewed-by: Thierry Reding <treding@xxxxxxxxxx>