Re: [PATCH] gpio: da9062: fix uninitialized variable read

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Hi Ahmad,

thanks for covering that :)

On 19-10-01 08:25, Ahmad Fatoum wrote:
> In cases where reg < 0x100, WARN_ON will evaluate the uninitialized
> client variable. Fix this by initializing it to NULL.
> This way, the function will always early-return if the reg is < 0x100.
> 
> Fixes: 17a43d293c ("gpio: add DA9062 MFD gpio support")
> Signed-off-by: Ahmad Fatoum <ahmad@xxxxxx>

Reviewed-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>

> ---
>  drivers/gpio/gpio-da9062.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpio/gpio-da9062.c b/drivers/gpio/gpio-da9062.c
> index 2f018166ccc5..2d4bde7508be 100644
> --- a/drivers/gpio/gpio-da9062.c
> +++ b/drivers/gpio/gpio-da9062.c
> @@ -37,7 +37,7 @@ static inline struct da9062_gpio *to_da9062(struct gpio_chip *chip)
>  static int gpio_da9062_reg_update(struct da9062_gpio *priv, unsigned int reg,
>  				  uint8_t mask, uint8_t val)
>  {
> -	struct i2c_client *client;
> +	struct i2c_client *client = NULL;
>  	uint8_t tmp;
>  	int ret;
>  
> -- 
> 2.20.1
> 
> 
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