Bug#500358:

["Max Dmitrichenko" <dmitrmax@gmail.com>]

Proposed patch. Explanations here [1].

[1] http://marc.info/?l=linux-kernel&m=122545873605649&w=2

--
  Max

diff -uprN linux-source-2.6.26/arch/sparc64/kernel/pci.c linux-source-2.6.26.pci-fixed/arch/sparc64/kernel/pci.c
--- linux-source-2.6.26/arch/sparc64/kernel/pci.c	2008-07-14 01:51:29.000000000 +0400
+++ linux-source-2.6.26.pci-fixed/arch/sparc64/kernel/pci.c	2008-10-31 01:23:54.000000000 +0300
@@ -1017,6 +1017,7 @@ static int __pci_mmap_make_offset(struct
 
 	for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
 		struct resource *rp = &pdev->resource[i];
+		resource_size_t aligned_end;
 
 		/* Active? */
 		if (!rp->flags)
@@ -1034,8 +1035,15 @@ static int __pci_mmap_make_offset(struct
 				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;
 	}