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Commit 2a41ccee authored by Jiang Liu's avatar Jiang Liu Committed by Joerg Roedel
Browse files

iommu/vt-d: Change iommu_enable/disable_translation to return void 



Simplify error handling path by changing iommu_{enable|disable}_translation
to return void.

Signed-off-by: default avatarJiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 8594d832

drivers/iommu/intel-iommu.c

+5 −13
Original line number Diff line number Diff line
@@ -1389,7 +1389,7 @@ static void iommu_disable_protect_mem_regions(struct intel_iommu *iommu) 
	raw_spin_unlock_irqrestore(&iommu->register_lock, flags);

}



static int iommu_enable_translation(struct intel_iommu *iommu)

static void iommu_enable_translation(struct intel_iommu *iommu)

{

	u32 sts;

	unsigned long flags;
@@ -1403,10 +1403,9 @@ static int iommu_enable_translation(struct intel_iommu *iommu) 
		      readl, (sts & DMA_GSTS_TES), sts);



	raw_spin_unlock_irqrestore(&iommu->register_lock, flags);

	return 0;

}



static int iommu_disable_translation(struct intel_iommu *iommu)

static void iommu_disable_translation(struct intel_iommu *iommu)

{

	u32 sts;

	unsigned long flag;
@@ -1420,7 +1419,6 @@ static int iommu_disable_translation(struct intel_iommu *iommu) 
		      readl, (!(sts & DMA_GSTS_TES)), sts);



	raw_spin_unlock_irqrestore(&iommu->register_lock, flag);

	return 0;

}
@@ -2860,11 +2858,7 @@ static int __init init_dmars(void) 


		iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL);

		iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH);



		ret = iommu_enable_translation(iommu);

		if (ret)

			goto free_iommu;



		iommu_enable_translation(iommu);

		iommu_disable_protect_mem_regions(iommu);

	}
@@ -3578,10 +3572,8 @@ static int init_iommu_hw(void) 


		iommu->flush.flush_context(iommu, 0, 0, 0,

					   DMA_CCMD_GLOBAL_INVL);

		iommu->flush.flush_iotlb(iommu, 0, 0, 0,

					 DMA_TLB_GLOBAL_FLUSH);

		if (iommu_enable_translation(iommu))

			return 1;

		iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH);

		iommu_enable_translation(iommu);

		iommu_disable_protect_mem_regions(iommu);

	}