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

Thierry Reding <[email protected]> Thu, 20 Aug 2026 12:20:53 +0200

Newsgroups	org.kernel.vger.linux-tegra,org.kernel.vger.linux-kernel,org.kernel.vger.linux-sound
Message-ID	<aobUUhKX4rGgjQzX@orome>

On Tue, Aug 18, 2026 at 01:33:45PM -0700, Rosen Penev wrote:
> 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 <[email protected]>
> >> ---
> >>  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.

Huh? Why not do this right away, then? It's a waste of everyone's time
to do these two-staged "cleanups". You're making maintainers do the work
twice for no benefit whatsoever.

Thierry

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