[xen master] VT-d: don't open-code dmar_readl()

[patchbot@xxxxxxx]

commit 1ea7f6353405a59fea8d11f2ec1ca08ba3b299d0
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Tue Apr 13 10:15:08 2021 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Apr 13 10:15:08 2021 +0200

    VT-d: don't open-code dmar_readl()
    
    While at it also drop the unnecessary use of a local variable there.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
---
 xen/drivers/passthrough/vtd/iommu.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/xen/drivers/passthrough/vtd/iommu.c 
b/xen/drivers/passthrough/vtd/iommu.c
index 10c71132db..b2ca152e1f 100644
--- a/xen/drivers/passthrough/vtd/iommu.c
+++ b/xen/drivers/passthrough/vtd/iommu.c
@@ -990,8 +990,7 @@ static void __do_iommu_page_fault(struct vtd_iommu *iommu)
     }
 clear_overflow:
     /* clear primary fault overflow */
-    fault_status = readl(iommu->reg + DMAR_FSTS_REG);
-    if ( fault_status & DMA_FSTS_PFO )
+    if ( dmar_readl(iommu->reg, DMAR_FSTS_REG) & DMA_FSTS_PFO )
     {
         spin_lock_irqsave(&iommu->register_lock, flags);
         dmar_writel(iommu->reg, DMAR_FSTS_REG, DMA_FSTS_PFO);
--
generated by git-patchbot for /home/xen/git/xen.git#master