Commits
Will Deacon committed 3acf4223bd6
FROMLIST: drivers/iommu: Allow IOMMU bus ops to be unregistered 'bus_set_iommu()' allows IOMMU drivers to register their ops for a given bus type. Unfortunately, it then doesn't allow them to be removed, which is necessary for modular drivers to shutdown cleanly so that they can be reloaded later on. Allow 'bus_set_iommu()' to take a NULL 'ops' argument, which clear the ops pointer for the selected bus_type. Signed-off-by: Will Deacon <will@kernel.org> Bug: 140290589 Link: https://lore.kernel.org/lkml/20191121114918.2293-7-will@kernel.org/ Signed-off-by: Will Deacon <willdeacon@google.com> Change-Id: Ia89fa2df61d2a9ad04901d4c2e71e293c4c6171d