iommu/arm-smmu-v3: Clean up more on probe failure

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[ Upstream commit fcbd621567 ]

kmemleak noticed that the iopf queue allocated deep down within
arm_smmu_init_structures() can be leaked by a subsequent error return
from arm_smmu_device_probe(). Furthermore, after arm_smmu_device_reset()
we will also leave the SMMU enabled with an empty Stream Table, silently
blocking all DMA. This proves rather annoying for debugging said probe
failure, so let's handle it a bit better by putting the SMMU back into
(more or less) the same state as if it hadn't probed at all.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/5137901958471cf67f2fad5c2229f8a8f1ae901a.1733406914.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Robin Murphy 2024-12-05 16:33:57 +00:00 • committed by Greg Kroah-Hartman

parent d888437bd3

commit c578aedea2

1 changed files with 12 additions and 5 deletions

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drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

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