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SubjectRe: [PATCH v1 1/1] pinctrl: stm32: Unshadow np variable in stm32_pctl_probe()
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Hi Andy


Thank you for the patch.

Will this patch be applied in Linus pinctrl tree, or in the gpio-intel
tree before being merged (linux-next) in the pinctrl tree?

BR

Fabien



On 07/05/2022 12:22, Andy Shevchenko wrote:
> The np variable is used globally for stm32_pctl_probe() and in one of
> its code branches. cppcheck is not happy with that:
>
> pinctrl-stm32.c:1530:23: warning: Local variable 'np' shadows outer variable [shadowVariable]
>
> Instead of simply renaming one of the variables convert some code to
> use a device pointer directly.
>
> Fixes: bb949ed9b16b ("pinctrl: stm32: Switch to use for_each_gpiochip_node() helper")
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Reviewed-by: Fabien Dessenne <fabien.dessenne@foss.st.com>



> ---
> drivers/pinctrl/stm32/pinctrl-stm32.c | 21 +++++++++------------
> 1 file changed, 9 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c
> index e73f2d24611f..5d1d067b2247 100644
> --- a/drivers/pinctrl/stm32/pinctrl-stm32.c
> +++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
> @@ -1364,8 +1364,9 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, struct fwnode
> return err;
> }
>
> -static struct irq_domain *stm32_pctrl_get_irq_domain(struct device_node *np)
> +static struct irq_domain *stm32_pctrl_get_irq_domain(struct platform_device *pdev)
> {
> + struct device_node *np = pdev->dev.of_node;
> struct device_node *parent;
> struct irq_domain *domain;
>
> @@ -1482,23 +1483,19 @@ static int stm32_pctrl_create_pins_tab(struct stm32_pinctrl *pctl,
>
> int stm32_pctl_probe(struct platform_device *pdev)
> {
> - struct device_node *np = pdev->dev.of_node;
> + const struct stm32_pinctrl_match_data *match_data;
> struct fwnode_handle *child;
> - const struct of_device_id *match;
> struct device *dev = &pdev->dev;
> struct stm32_pinctrl *pctl;
> struct pinctrl_pin_desc *pins;
> int i, ret, hwlock_id;
> unsigned int banks;
>
> - if (!np)
> - return -EINVAL;
> -
> - match = of_match_device(dev->driver->of_match_table, dev);
> - if (!match || !match->data)
> + match_data = device_get_match_data(dev);
> + if (!match_data)
> return -EINVAL;
>
> - if (!of_find_property(np, "pins-are-numbered", NULL)) {
> + if (!device_property_present(dev, "pins-are-numbered")) {
> dev_err(dev, "only support pins-are-numbered format\n");
> return -EINVAL;
> }
> @@ -1510,7 +1507,7 @@ int stm32_pctl_probe(struct platform_device *pdev)
> platform_set_drvdata(pdev, pctl);
>
> /* check for IRQ controller (may require deferred probe) */
> - pctl->domain = stm32_pctrl_get_irq_domain(np);
> + pctl->domain = stm32_pctrl_get_irq_domain(pdev);
> if (IS_ERR(pctl->domain))
> return PTR_ERR(pctl->domain);
>
> @@ -1526,10 +1523,10 @@ int stm32_pctl_probe(struct platform_device *pdev)
> spin_lock_init(&pctl->irqmux_lock);
>
> pctl->dev = dev;
> - pctl->match_data = match->data;
> + pctl->match_data = match_data;
>
> /* get optional package information */
> - if (!of_property_read_u32(np, "st,package", &pctl->pkg))
> + if (!device_property_read_u32(dev, "st,package", &pctl->pkg))
> dev_dbg(pctl->dev, "package detected: %x\n", pctl->pkg);
>
> pctl->pins = devm_kcalloc(pctl->dev, pctl->match_data->npins,

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