Re: [PATCH] reset: rzg2l-usbphy-ctrl: Check pwrrdy is valid before using it

[Philipp Zabel <p.zabel@pengutronix.de>]

On Mi, 2026-02-04 at 15:34 +0200, Claudiu wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> 
> The pwrrdy regmap_filed is allocated in rzg2l_usbphy_ctrl_pwrrdy_init()
> only if the driver data is set to RZG2L_USBPHY_CTRL_PWRRDY. Check that
> pwrrdy is valid before using it to avoid "Unable to handle kernel NULL
> pointer dereference at virtual address" errors.
> 
> Fixes: c5b7cd9adefc ("reset: rzg2l-usbphy-ctrl: Add suspend/resume support")
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> ---
>  drivers/reset/reset-rzg2l-usbphy-ctrl.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/reset/reset-rzg2l-usbphy-ctrl.c b/drivers/reset/reset-rzg2l-usbphy-ctrl.c
> index 32bc268c9149..05dd9b4a02df 100644
> --- a/drivers/reset/reset-rzg2l-usbphy-ctrl.c
> +++ b/drivers/reset/reset-rzg2l-usbphy-ctrl.c
> @@ -136,6 +136,9 @@ static int rzg2l_usbphy_ctrl_set_pwrrdy(struct regmap_field *pwrrdy,
>  {
>  	u32 val = power_on ? 0 : 1;
>  
> +	if (!pwrrdy)
> +		return 0;
> +
>  	/* The initialization path guarantees that the mask is 1 bit long. */
>  	return regmap_field_update_bits(pwrrdy, 1, val);
>  }

Applied to reset/fixes, thanks!

[1/1] reset: rzg2l-usbphy-ctrl: Check pwrrdy is valid before using it
      https://git.pengutronix.de/cgit/pza/linux/commit/?id=e0cf84109bc6

regards
Philipp