On Fri, Jun 16, 2023 at 10:59:24AM +0800, cy_huang@xxxxxxxxxxx wrote:
> From: ChiYuan Huang <cy_huang@xxxxxxxxxxx>
>
> For the pointer assignment in function body, double pointer must be used as
> the input parameter.
>
> Fixes: c12ac5fc3e0a ("regulator: drivers: Add TI TPS65219 PMIC regulators support")
> Signed-off-by: ChiYuan Huang <cy_huang@xxxxxxxxxxx>
Please ignore it. Krzysztof's patch already fix it and applied.
https://lore.kernel.org/lkml/20230507144656.192800-1-krzysztof.kozlowski@xxxxxxxxxx/
> ---
> Hi,
>
> I try to fix W=1 build warning for tps65219-regulator.
>
> W=1
> warning: parameter ‘dev’ set but not used [-Wunused-but-set-parameter]
> struct regulator_dev *dev)
> ^~~~~
> But the issue is not what the warning message described.
>
> In tps65219_get_rdev_by_name(), it must return the found rdev and assign it
> in 'dev' pointer. Due to pointer assignment issue, it doesn't.
>
> The original code may not cause any problem. But it always takes the last
> registered regulator rdev for all tps65219 regulator interrupts.
> ---
> drivers/regulator/tps65219-regulator.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/regulator/tps65219-regulator.c b/drivers/regulator/tps65219-regulator.c
> index b1719ee990ab..8971b507a79a 100644
> --- a/drivers/regulator/tps65219-regulator.c
> +++ b/drivers/regulator/tps65219-regulator.c
> @@ -289,13 +289,13 @@ static irqreturn_t tps65219_regulator_irq_handler(int irq, void *data)
>
> static int tps65219_get_rdev_by_name(const char *regulator_name,
> struct regulator_dev *rdevtbl[7],
> - struct regulator_dev *dev)
> + struct regulator_dev **dev)
> {
> int i;
>
> for (i = 0; i < ARRAY_SIZE(regulators); i++) {
> if (strcmp(regulator_name, regulators[i].name) == 0) {
> - dev = rdevtbl[i];
> + *dev = rdevtbl[i];
> return 0;
> }
> }
> @@ -348,7 +348,7 @@ static int tps65219_regulator_probe(struct platform_device *pdev)
> irq_data[i].dev = tps->dev;
> irq_data[i].type = irq_type;
>
> - tps65219_get_rdev_by_name(irq_type->regulator_name, rdevtbl, rdev);
> + tps65219_get_rdev_by_name(irq_type->regulator_name, rdevtbl, &rdev);
> if (IS_ERR(rdev)) {
> dev_err(tps->dev, "Failed to get rdev for %s\n",
> irq_type->regulator_name);
> --
> 2.40.1
>
