iommufd: Improve a few unclear bits of code
Correct a few items noticed late in review: - We should assert that the math in batch_clear_carry() doesn't underflow - user->locked should be -1 not 0 sicne we just did mmput - npages should not have been recalculated, it already has that value No functional change. Fixes: 8d160cd4 ("iommufd: Algorithms for PFN storage") Link: https://lore.kernel.org/r/2-v1-0362a1a1c034+98-iommufd_fixes1_jgg@nvidia.com Reviewed-by:Kevin Tian <kevin.tian@intel.com> Reviewed-by:
Eric Auger <eric.auger@redhat.com> Reported-by:
Binbin Wu <binbin.wu@linux.intel.com> Signed-off-by:
Jason Gunthorpe <jgg@nvidia.com>
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