Re: [PATCH v2] iommu/mediatek: fix NULL pointer dereference when printing dev_name

[Miles Chen]

hi Robin,

>> -	link = device_link_add(dev, larbdev,
>> -			       DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS);
>> -	if (!link)
>> -		dev_err(dev, "Unable to link %s\n", dev_name(larbdev));
>> +	if (larbdev) {
>
>Until the MT8195 infra MMU support lands, is there ever a case where 
>it's actually valid for larbdev to be NULL? If not, I think it would be 
>a lot clearer to explicitly fail the probe here, rather than silently 
>continue and risk fatal errors, hangs, or other weird behaviour if 
>there's no guarantee that the correct LARB is powered up (plus then the 
>release callbacks wouldn't need to worry about it either).

Thanks, I will do probe fail in patch v3 and remove the release modification.

thanks,
Miles

>
>Robin.