Re: [PATCH v7 05/17] drm/panfrost: Skip NULL checks for clock enable/disabling

[Boris Brezillon]

On Fri, 28 Aug 2026 21:56:45 +0100
Adrián Larumbe <adrian.larumbe@xxxxxxxxxxxxx> wrote:

> The clk_* API can deal with NULL clock objects, so we can do away with NULL
> checks in client code.
> 
> Signed-off-by: Adrián Larumbe <adrian.larumbe@xxxxxxxxxxxxx>

Reviewed-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>

> ---
>  drivers/gpu/drm/panfrost/panfrost_device.c | 14 +++++---------
>  1 file changed, 5 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c
> index 6e3fcd53b690..a9d9669912e0 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_device.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_device.c
> @@ -540,11 +540,9 @@ static int panfrost_device_resume(struct device *dev)
>  		if (ret)
>  			goto err_clk;
>  
> -		if (pfdev->bus_clock) {
> -			ret = clk_enable(pfdev->bus_clock);
> -			if (ret)
> -				goto err_bus_clk;
> -		}
> +		ret = clk_enable(pfdev->bus_clock);
> +		if (ret)
> +			goto err_bus_clk;
>  	}
>  
>  	ret = pm_runtime_force_resume(dev);
> @@ -554,7 +552,7 @@ static int panfrost_device_resume(struct device *dev)
>  	return 0;
>  
>  err_resume:
> -	if (pfdev->comp->pm_features & BIT(GPU_PM_CLK_DIS) && pfdev->bus_clock)
> +	if (pfdev->comp->pm_features & BIT(GPU_PM_CLK_DIS))
>  		clk_disable(pfdev->bus_clock);
>  err_bus_clk:
>  	if (pfdev->comp->pm_features & BIT(GPU_PM_CLK_DIS))
> @@ -575,9 +573,7 @@ static int panfrost_device_suspend(struct device *dev)
>  		return ret;
>  
>  	if (pfdev->comp->pm_features & BIT(GPU_PM_CLK_DIS)) {
> -		if (pfdev->bus_clock)
> -			clk_disable(pfdev->bus_clock);
> -
> +		clk_disable(pfdev->bus_clock);
>  		clk_disable(pfdev->clock);
>  	}
>  
>