[PATCH] Optimize PDA accesses slightly

[linux-2.6-omap-h63xx.git] / arch / x86_64 / kernel / pci-swiotlb.c

diff --git a/arch/x86_64/kernel/pci-swiotlb.c b/arch/x86_64/kernel/pci-swiotlb.c
index 990ed67896f2ff514cc6283a65fea24fa00adcf1..6a55f87ba97f917ed2814bc3c11c3f21a3ad096b 100644 (file)
--- a/arch/x86_64/kernel/pci-swiotlb.c
+++ b/arch/x86_64/kernel/pci-swiotlb.c
@@ -31,9 +31,10 @@ struct dma_mapping_ops swiotlb_dma_ops = {
 void pci_swiotlb_init(void)
 {
        /* don't initialize swiotlb if iommu=off (no_iommu=1) */
-       if (!iommu_aperture && !no_iommu &&
-           (end_pfn > MAX_DMA32_PFN || force_iommu))
+       if (!iommu_detected && !no_iommu && end_pfn > MAX_DMA32_PFN)
               swiotlb = 1;
+       if (swiotlb_force)
+               swiotlb = 1;
        if (swiotlb) {
                printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n");
                swiotlb_init();