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| 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 | |
| parent | 44de3395a4bb61341dfb7b3b7c94edfddeabae4b (diff) | |
| download | linux-3.10-5ee01f49c963d5e0b530344f86535ecb7f672064.tar.gz linux-3.10-5ee01f49c963d5e0b530344f86535ecb7f672064.tar.bz2 linux-3.10-5ee01f49c963d5e0b530344f86535ecb7f672064.zip | |
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
| -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 55253095be8..8379c2c3d07 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, |