sparc64: Fix PCI resource mapping on sparc64

[linux-2.6-omap-h63xx.git] / arch / sparc64 / kernel / pci.c

diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c
index 242ac1ccae7d5866b3beac630780cf501cb26f45..bdb7c0a6d83ddaf57cf01d78dde54887c827e982 100644 (file)
--- a/arch/sparc64/kernel/pci.c
+++ b/arch/sparc64/kernel/pci.c
@@ -889,6 +889,7 @@ static int __pci_mmap_make_offset(struct pci_dev *pdev,
 
        for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
                struct resource *rp = &pdev->resource[i];
+               resource_size_t aligned_end;
 
                /* Active? */
                if (!rp->flags)
@@ -906,8 +907,15 @@ static int __pci_mmap_make_offset(struct pci_dev *pdev,
                                continue;
                }
 
+               /* Align the resource end to the next page address.
+                * PAGE_SIZE intentionally added instead of (PAGE_SIZE - 1),
+                * because actually we need the address of the next byte
+                * after rp->end.
+                */
+               aligned_end = (rp->end + PAGE_SIZE) & PAGE_MASK;
+
                if ((rp->start <= user_paddr) &&
-                   (user_paddr + user_size) <= (rp->end + 1UL))
+                   (user_paddr + user_size) <= aligned_end)
                        break;
        }