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arm64: dma-mapping: fix handling of devices registered before arch_initcall

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This patch ensures that devices, which got registered before arch_initcall
will be handled correctly by IOMMU-based DMA-mapping code.

Cc: <stable@vger.kernel.org>
Fixes: 13b8629f65 ("arm64: Add IOMMU dma_ops")
Acked-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Marek Szyprowski 2016-02-16 15:14:44 +01:00 committed by Will Deacon
parent 7f4e346263
commit 722ec35f7f
1 changed files with 4 additions and 0 deletions
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4
arch/arm64/mm/dma-mapping.c
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@ -933,6 +933,10 @@ static int __init __iommu_dma_init(void)
ret = register_iommu_dma_ops_notifier(&platform_bus_type);
if (!ret)
ret = register_iommu_dma_ops_notifier(&amba_bustype);
/* handle devices queued before this arch_initcall */
if (!ret)
__iommu_attach_notifier(NULL, BUS_NOTIFY_ADD_DEVICE, NULL);
return ret;
}
arch_initcall(__iommu_dma_init);