Re: [PATCH RESEND 2/3] iommu: omap: Simplify returning syscon PTR_ERR

From: Krzysztof Kozlowski
Date: Fri Feb 14 2025 - 02:27:46 EST


On 13/02/2025 12:30, Robin Murphy wrote:
> On 2025-02-12 8:19 pm, Krzysztof Kozlowski wrote:
>> No need to store PTR_ERR into temporary, local 'ret' variable.
>>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
>> ---
>> drivers/iommu/omap-iommu.c | 4 +---
>> 1 file changed, 1 insertion(+), 3 deletions(-)
>>
>> diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
>> index 04a7deaaba25cb270eb6eeaf6a21030440f78a5e..bce27805805010ae473aa8dbd9e0cb903dd79bba 100644
>> --- a/drivers/iommu/omap-iommu.c
>> +++ b/drivers/iommu/omap-iommu.c
>> @@ -1123,7 +1123,6 @@ 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;
>> @@ -1132,8 +1131,7 @@ static int omap_iommu_dra7_get_dsp_system_cfg(struct platform_device *pdev,
>> syscon_regmap_lookup_by_phandle(np, "ti,syscon-mmuconfig");
>> if (IS_ERR(obj->syscfg)) {
>> /* can fail with -EPROBE_DEFER */
>
> This comment is no longer correct or useful, since it's alluding to the
> check which you removed in the previous patch. I'd just clean up the


I wouldn't call it useful ever, but I assume someone wants to note for
themself how syscon lookup works...

> whole lot in patch #1 as it's all closely related, and also turn this
> return into a dev_err_probe() to capture the spirit of the other errors
> being replaced, perhaps something like "No valid ti,syscon-mmuconfig
> available" - that way it adds some value for debugging probe deferral
> issues more than broken DTs.

Ack


Best regards,
Krzysztof