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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: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jiang Liu 2014-07-11 14:19:33 +08:00 committed by Joerg Roedel
parent 8594d83261
commit 2a41ccee2f
1 changed files with 5 additions and 13 deletions
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18
drivers/iommu/intel-iommu.c
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@ -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);
}