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ARM: dma-mapping: NULLify dev->archdata.mapping pointer on detach

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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: Will Deacon <will.deacon@arm.com>
Acked-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
This commit is contained in:
Will Deacon 2013-06-10 19:34:40 +01:00 committed by Marek Szyprowski
parent 13987d68bc
commit 9e4b259d4f
1 changed files with 1 additions and 1 deletions
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arch/arm/mm/dma-mapping.c
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@ -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));