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

[Rosen Penev]

On Thu, Aug 20, 2026 at 3:20 AM Thierry Reding
<thierry.reding@xxxxxxxxxx> wrote:
>
> 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 <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.
>
> 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.
I'm not handling that patchset. That's the linux hardening people.
>
> Thierry