From 2a41ccee2fdc39df5bdcf5819ed3c0b4a62aea43 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Fri, 11 Jul 2014 14:19:33 +0800 Subject: [PATCH] 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 Signed-off-by: Joerg Roedel --- drivers/iommu/intel-iommu.c | 18 +++++------------- 1 file changed, 5 insertions(+), 13 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 5d7383775bf1..0ba078bc0f32 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -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); }