diff options
author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-03-18 14:31:30 -0400 |
---|---|---|
committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2010-10-18 10:49:31 -0400 |
commit | 5ee01f49c963d5e0b530344f86535ecb7f672064 (patch) | |
tree | 6183f34dece7278fe0927f4d516f100bf54ecb0a /arch/x86 | |
parent | 44de3395a4bb61341dfb7b3b7c94edfddeabae4b (diff) |
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
Diffstat (limited to 'arch/x86')
-rw-r--r-- | 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 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, | |||
311 | */ | 311 | */ |
312 | prot |= _PAGE_CACHE_UC_MINUS; | 312 | prot |= _PAGE_CACHE_UC_MINUS; |
313 | 313 | ||
314 | prot |= _PAGE_IOMAP; /* creating a mapping for IO */ | ||
315 | |||
314 | vma->vm_page_prot = __pgprot(prot); | 316 | vma->vm_page_prot = __pgprot(prot); |
315 | 317 | ||
316 | if (io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, | 318 | if (io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, |