Messages in this thread Patch in this message | | | From | Konrad Rzeszutek Wilk <> | Subject | [PATCH 13/23] x86/PCI: make sure _PAGE_IOMAP it set on pci mappings | Date | Tue, 12 Oct 2010 11:44:21 -0400 |
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From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
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 <jeremy.fitzhardinge@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: "H. Peter Anvin" <hpa@zytor.com> Reviewed-by: Matthew Wilcox <willy@linux.intel.com> Cc: x86@kernel.org Cc: Jesse Barnes <jbarnes@virtuousgeek.org> --- arch/x86/pci/i386.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index 5525309..8379c2c 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, -- 1.7.0.4
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