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iommu/arm-smmu-v3: Disable the impl before disabling the SMMU on shutdown

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arm_smmu_device_shutdown() only calls arm_smmu_device_disable(), and never
the impl_ops->device_disable() hook. On tegra241-cmdqv, that hook quiesces
every VINTF through tegra241_vintf_hw_deinit(), which issues a CMD_SYNC on
the shared CMDQ while it is still enabled.

arm_smmu_disable_action() already runs this hook before disabling the SMMU,
to cover an unbind or a probe failure, and no devres release ever follows a
reboot or a kexec to run it again. Have arm_smmu_device_shutdown() call it
directly, instead of reimplementing part of what it already does.

Fixes: 9ff145a25c ("iommu/tegra241-cmdqv: Fix CMD_SYNC use-after-free on teardown")
Cc: stable@vger.kernel.org
Reviewed-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
Assisted-by: LLM
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Nicolin Chen 2026-09-15 09:38:13 -07:00 committed by Will Deacon
parent d587faf668
commit ab0dbf411a
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
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@ -5874,7 +5874,7 @@ static void arm_smmu_device_shutdown(struct platform_device *pdev)
{
struct arm_smmu_device *smmu = platform_get_drvdata(pdev);
arm_smmu_device_disable(smmu);
arm_smmu_disable_action(smmu);
}
static const struct of_device_id arm_smmu_of_match[] = {