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| author | David Woodhouse <David.Woodhouse@intel.com> | 2009-05-10 20:30:58 +0100 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-05-10 20:32:37 +0100 |
| commit | c416daa98a584596df21ee2c26fac6579ee58f57 (patch) | |
| tree | 161a5aaf1e63a14ce8895046139c2ce695b89531 /drivers/pci/dmar.c | |
| parent | 462b60f6ccc685f7e8aa04ff430e6b4ffedf629f (diff) | |
| download | lwn-c416daa98a584596df21ee2c26fac6579ee58f57.tar.gz lwn-c416daa98a584596df21ee2c26fac6579ee58f57.zip | |
intel-iommu: Tidy up iommu->gcmd handling
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/pci/dmar.c')
| -rw-r--r-- | drivers/pci/dmar.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c index df6af0d4ec03..faf77a00cafe 100644 --- a/drivers/pci/dmar.c +++ b/drivers/pci/dmar.c @@ -784,7 +784,6 @@ void dmar_disable_qi(struct intel_iommu *iommu) cpu_relax(); iommu->gcmd &= ~DMA_GCMD_QIE; - writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, readl, @@ -798,7 +797,7 @@ end: */ static void __dmar_enable_qi(struct intel_iommu *iommu) { - u32 cmd, sts; + u32 sts; unsigned long flags; struct q_inval *qi = iommu->qi; @@ -812,9 +811,8 @@ static void __dmar_enable_qi(struct intel_iommu *iommu) dmar_writeq(iommu->reg + DMAR_IQA_REG, virt_to_phys(qi->desc)); - cmd = iommu->gcmd | DMA_GCMD_QIE; iommu->gcmd |= DMA_GCMD_QIE; - writel(cmd, iommu->reg + DMAR_GCMD_REG); + writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); /* Make sure hardware complete it */ IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, readl, (sts & DMA_GSTS_QIES), sts); |