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SubjectRe: [PATCH v3 3/3] drm/panel-simple: allow LVDS format override
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Hi Dan,

thanks for your feedback.

On 7/28/23 14:03, Dan Carpenter wrote:
> On Fri, Jul 28, 2023 at 01:54:40PM +0200, Johannes Zink wrote:
>> @@ -556,7 +602,7 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
>> struct device_node *ddc;
>> int connector_type;
>> u32 bus_flags;
>> - int err;
>> + int err, ret;
>
> I don't like this at all...
>
>>
>> panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL);
>> if (!panel)
>> @@ -601,6 +647,13 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
>> panel_simple_parse_panel_timing_node(dev, panel, &dt);
>> }
>>
>> + if (desc->connector_type == DRM_MODE_CONNECTOR_LVDS) {
>> + /* Optional data-mapping property for overriding bus format */
>> + ret = panel_simple_override_nondefault_lvds_datamapping(dev, panel);
>> + if (ret)
>> + goto free_ddc;
>
> This *looks* like we are returning an error but we aren't. I think we
> should be. If not then we need to have a discussion about that and
> add some comments.
>

Good catch. This should actually be err instead of ret. This way we'd make sure
to return -ENOMEM from panel_simple_probe() in case an error occured due
to devm_kmemdup failing in panel_simple_override_nondefault_lvds_datamapping().

I'll send a v4 with that fixed.

Thanks for having my back!
Johannes

> regards,
> dan carpenter
>
>> + }
>> +
>> connector_type = desc->connector_type;
>> /* Catch common mistakes for panels. */
>> switch (connector_type) {
>>
>> --
>> 2.39.2
>
>

--
Pengutronix e.K. | Johannes Zink |
Steuerwalder Str. 21 | https://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686| Fax: +49-5121-206917-5555 |

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