[v4] iommu/riscv: prevent NULL deref in iova_to_phys

[Markus Elfring]

>> Does it trigger undesirable communication difficulties?
> No, and I agree that both subject and summary phrase can be improved

I suggest to take another look for the better distinction of mentioned key words.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.17-rc2#n638

Regards,
Markus