Vladimir Oltean 32ea2c57dc iommu/arm-smmu-v3: Don't unregister on shutdown ... Similar to SMMUv2, this driver calls iommu_device_unregister() from the shutdown path, which removes the IOMMU groups with no coordination whatsoever with their users - shutdown methods are optional in device drivers. This can lead to NULL pointer dereferences in those drivers' DMA API calls, or worse. Instead of calling the full arm_smmu_device_remove() from arm_smmu_device_shutdown(), let's pick only the relevant function call - arm_smmu_device_disable() - more or less the reverse of arm_smmu_device_reset() - and call just that from the shutdown path. Fixes: 57365a04c9 ("iommu: Move bus setup to IOMMU device registration") Suggested-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Link: https://lore.kernel.org/r/20221215141251.3688780-2-vladimir.oltean@nxp.com Signed-off-by: Will Deacon <will@kernel.org>		2023-01-13 13:46:21 +01:00
..
arm-smmu	iommu/arm-smmu: Don't unregister on shutdown	2023-01-13 13:46:20 +01:00
arm-smmu-v3	iommu/arm-smmu-v3: Don't unregister on shutdown	2023-01-13 13:46:21 +01:00
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