iommu/io-pgtable: Abstract iommu_iotlb_gather access
Previously io-pgtable merely passed the iommu_iotlb_gather pointer through to helpers, but now it has grown its own direct dereference. This turns out to break the build for !IOMMU_API configs where the structure only has a dummy definition. It will probably also crash drivers who don't use the gather mechanism and simply pass in NULL. Wrap this dereference in a suitable helper which can both be stubbed out for !IOMMU_API and encapsulate a NULL check otherwise. Fixes: 7a7c5bad ("iommu: Indicate queued flushes via gather data") Reported-by:kernel test robot <lkp@intel.com> Signed-off-by:
Robin Murphy <robin.murphy@arm.com> Link: https://lore.kernel.org/r/83672ee76f6405c82845a55c148fa836f56fbbc1.1629465282.git.robin.murphy@arm.com Signed-off-by:
Joerg Roedel <jroedel@suse.de>
parent
452e69b5
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