intel-iommu: Tidy up iommu->gcmd handling
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index df6af0d..faf77a0 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -784,7 +784,6 @@
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 @@
*/
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 @@
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);