Commit 5ee01f49 authored Mar 18, 2010 by Jeremy Fitzhardinge Committed by Konrad Rzeszutek Wilk Oct 18, 2010

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 <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>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: x86@kernel.org

parent 44de3395

arch/x86/pci/i386.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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,

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