Re: [PATCH 3/4] iommu/of: Don't call iommu_ops->add_device directly

[Joerg Roedel]

On Wed, Dec 05, 2018 at 06:49:26PM +0000, Robin Murphy wrote:
> 	if (ops && dev->bus && !dev->iommu_group)
> 
> What I can't quite remember just now is whether it's actually valid to get
> here with err == 0 but dev->iommu_fwspec->ops == NULL, so it *might* be OK
> to use "!err" instead of "ops" to make things slightly more obvious - I'll
> work through the flow tomorrow to double-check.

Yeah, adding an err == 0 check seems to be the best option here, so that
iommu-drivers don't get confused when we try to add a device that is not
managed by an iommu.


Regards,

	Joerg