Messages in this thread Patch in this message |  | | | From | Jeremy Fitzhardinge <> | | Subject | [PATCH 09/11] x86/pci: make sure _PAGE_IOMAP it set on pci mappings | | Date | Thu, 7 May 2009 14:45:35 -0700 |
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From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Impact: bugfix
When mapping pci space via /sys or /proc, make sure we're really doing a hardware mapping by setting _PAGE_IOMAP.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Reviewed-by: "H. Peter Anvin" <hpa@zytor.com> --- arch/x86/pci/i386.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index f1817f7..255aece 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -274,6 +274,9 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, return -EINVAL; prot = pgprot_val(vma->vm_page_prot); + + prot |= _PAGE_IOMAP; /* creating a mapping for IO */ + if (pat_enabled && write_combine) prot |= _PAGE_CACHE_WC; else if (pat_enabled || boot_cpu_data.x86 > 3) -- 1.6.0.6
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