From 5ee01f49c963d5e0b530344f86535ecb7f672064 Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge Date: Thu, 18 Mar 2010 14:31:30 -0400 Subject: x86/PCI: make sure _PAGE_IOMAP it set on pci mappings When mapping pci space via /sys or /proc, make sure we're really doing a hardware mapping by setting _PAGE_IOMAP. [ Impact: bugfix; make PCI mappings map the right pages ] Signed-off-by: Jeremy Fitzhardinge Reviewed-by: Konrad Rzeszutek Wilk Reviewed-by: "H. Peter Anvin" Reviewed-by: Matthew Wilcox Acked-by: Jesse Barnes Cc: x86@kernel.org --- arch/x86/pci/i386.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index 55253095be84..8379c2c3d076 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -311,6 +311,8 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, */ prot |= _PAGE_CACHE_UC_MINUS; + prot |= _PAGE_IOMAP; /* creating a mapping for IO */ + vma->vm_page_prot = __pgprot(prot); if (io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, -- cgit v1.2.1