iommu/vt-d: Fix 64-bit accesses to 32-bit DMAR_GSTS_REG

[firefly-linux-kernel-4.4.55.git] / drivers / iommu / dmar.c

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 80e3c176008e511ec75c1771758b63de8ad39d9d..55a19e49205bcab9ad05c6d9bae05a4a6f02721a 100644 (file)
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -1347,7 +1347,7 @@ void dmar_disable_qi(struct intel_iommu *iommu)
 
        raw_spin_lock_irqsave(&iommu->register_lock, flags);
 
-       sts =  dmar_readq(iommu->reg + DMAR_GSTS_REG);
+       sts =  readl(iommu->reg + DMAR_GSTS_REG);
        if (!(sts & DMA_GSTS_QIES))
                goto end;