Re: [PATCH v3 1/3] iommu: omap: Drop redundant check if ti,syscon-mmuconfig exists

[Robin Murphy <robin.murphy@arm.com>]

On 2025-06-24 1:22 pm, Krzysztof Kozlowski wrote:
> The syscon_regmap_lookup_by_phandle() will fail if property does not
> exist, so doing of_property_read_bool() earlier is redundant.  Drop that
> check and move error message to syscon_regmap_lookup_by_phandle() error
> case while converting it to dev_err_probe().

Sure, may as well.

Reviewed-by: Robin Murphy <robin.murphy@arm.com>

> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> ---
>   drivers/iommu/omap-iommu.c | 14 +++-----------
>   1 file changed, 3 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
> index 3c62337f43c67720a15b67e8b610da7886f6f39c..4448c0a512137c79195112eea25d762266c77bc3 100644
> --- a/drivers/iommu/omap-iommu.c
> +++ b/drivers/iommu/omap-iommu.c
> @@ -1123,23 +1123,15 @@ static int omap_iommu_dra7_get_dsp_system_cfg(struct platform_device *pdev,
>   					      struct omap_iommu *obj)
>   {
>   	struct device_node *np = pdev->dev.of_node;
> -	int ret;
>   
>   	if (!of_device_is_compatible(np, "ti,dra7-dsp-iommu"))
>   		return 0;
>   
> -	if (!of_property_read_bool(np, "ti,syscon-mmuconfig")) {
> -		dev_err(&pdev->dev, "ti,syscon-mmuconfig property is missing\n");
> -		return -EINVAL;
> -	}
> -
>   	obj->syscfg =
>   		syscon_regmap_lookup_by_phandle(np, "ti,syscon-mmuconfig");
> -	if (IS_ERR(obj->syscfg)) {
> -		/* can fail with -EPROBE_DEFER */
> -		ret = PTR_ERR(obj->syscfg);
> -		return ret;
> -	}
> +	if (IS_ERR(obj->syscfg))
> +		return dev_err_probe(&pdev->dev, PTR_ERR(obj->syscfg),
> +				     "ti,syscon-mmuconfig property is missing\n");
>   
>   	if (of_property_read_u32_index(np, "ti,syscon-mmuconfig", 1,
>   				       &obj->id)) {
>