1 files changed, 3 insertions, 1 deletions

diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 9f07cfcbd3a5..1b3beb5075e6 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -133,9 +133,11 @@ void __init pci_iommu_alloc(void)
         /* free the range so iommu could get some range less than 4G */
         dma32_free_bootmem();
 
-        if (pci_xen_swiotlb_detect() || pci_swiotlb_detect())
+        if (pci_xen_swiotlb_detect() || pci_swiotlb_detect_override())
                 goto out;
 
+        pci_swiotlb_detect_4gb();
+
         gart_iommu_hole_init();
 
         detect_calgary();