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pinctrl: tegra: use flexible array member for array

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Simplifies allocation slightly by removing a kcalloc call and using
struct_size.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
[linusw@kernel.org: Add in count variable and use __counted_by()]
Signed-off-by: Linus Walleij <linusw@kernel.org>
This commit is contained in:
Rosen Penev 2026-03-15 16:10:00 -07:00 • committed by Linus Walleij
commit d453086996
2 changed files with 5 additions and 9 deletions
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10
drivers/pinctrl/tegra/pinctrl-tegra.c
View file

@ -832,18 +832,14 @@ int tegra_pinctrl_probe(struct platform_device *pdev,
int fn, gn, gfn;
unsigned long backup_regs_size = 0;
pmx = devm_kzalloc(&pdev->dev, sizeof(*pmx), GFP_KERNEL);
pmx = devm_kzalloc(&pdev->dev,
struct_size(pmx, pingroup_configs, soc_data->ngroups), GFP_KERNEL);
if (!pmx)
return -ENOMEM;
pmx->dev = &pdev->dev;
pmx->soc = soc_data;
pmx->pingroup_configs = devm_kcalloc(&pdev->dev,
pmx->soc->ngroups, sizeof(*pmx->pingroup_configs),
GFP_KERNEL);
if (!pmx->pingroup_configs)
return -ENOMEM;
pmx->num_pingroup_configs = soc_data->ngroups;
/*
* Each mux group will appear in 4 functions' list of groups.

4
drivers/pinctrl/tegra/pinctrl-tegra.h
View file

@ -25,8 +25,8 @@ struct tegra_pmx {
int nbanks;
void __iomem **regs;
u32 *backup_regs;
/* Array of size soc->ngroups */
struct tegra_pingroup_config *pingroup_configs;
unsigned int num_pingroup_configs;
struct tegra_pingroup_config pingroup_configs[] __counted_by(num_pingroup_configs);
};
enum tegra_pinconf_param {