On Thu, Nov 03, 2016 at 04:22:04PM +0000, Robin Murphy wrote:
> But bus_set_iommu() is already checking whether another SMMU (in this
> case) has probed, by virtue of bus->iommu_ops being non-NULL, and
> returning without doing anything if so. What's the value of adding a
> whole bunch more code to effectively duplicate that in a less elegant
> manner?
No, bus_set_iommu() checks whether there is _any_ other IOMMU already
registered. This doesn't need to be an smmu. So I think the return value
of bus_set_iommu shouldn't be generally ignored.
Joerg
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