Merge branch 'intelfb-patches' of master.kernel.org:/pub/scm/linux/kernel/git/airlied...

[powerpc.git] / arch / x86_64 / kernel / pci-calgary.c

diff --git a/arch/x86_64/kernel/pci-calgary.c b/arch/x86_64/kernel/pci-calgary.c
index cd86613..cfb09b0 100644 (file)
--- a/arch/x86_64/kernel/pci-calgary.c
+++ b/arch/x86_64/kernel/pci-calgary.c
@@ -86,7 +86,8 @@
 
 #define MAX_NUM_OF_PHBS                8 /* how many PHBs in total? */
 #define MAX_NUM_CHASSIS                8 /* max number of chassis */
-#define MAX_PHB_BUS_NUM                (MAX_NUM_OF_PHBS * MAX_NUM_CHASSIS * 2) /* max dev->bus->number */
+/* MAX_PHB_BUS_NUM is the maximal possible dev->bus->number */
+#define MAX_PHB_BUS_NUM                (MAX_NUM_OF_PHBS * MAX_NUM_CHASSIS * 2)
 #define PHBS_PER_CALGARY       4
 
 /* register offsets in Calgary's internal register space */
@@ -923,6 +924,9 @@ void __init detect_calgary(void)
        if (swiotlb || no_iommu || iommu_detected)
                return;
 
+       if (!early_pci_allowed())
+               return;
+
        specified_table_size = determine_tce_table_size(end_pfn * PAGE_SIZE);
 
        for (bus = 0; bus < MAX_PHB_BUS_NUM; bus++) {