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Commit 9e4b259d authored by Will Deacon's avatar Will Deacon Committed by Marek Szyprowski
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ARM: dma-mapping: NULLify dev->archdata.mapping pointer on detach 



The current code only clobbers a local variable, so the device is left
with a stale mapping pointer.

Cc: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
Acked-by: default avatarHiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
parent 13987d68

arch/arm/mm/dma-mapping.c

+1 −1
Original line number Diff line number Diff line
@@ -1922,7 +1922,7 @@ void arm_iommu_detach_device(struct device *dev) 


	iommu_detach_device(mapping->domain, dev);

	kref_put(&mapping->kref, release_iommu_mapping);

	mapping = NULL;

	dev->archdata.mapping = NULL;

	set_dma_ops(dev, NULL);



	pr_debug("Detached IOMMU controller from %s device.\n", dev_name(dev));