diff options
| author | Bjorn Helgaas <bjorn.helgaas@hp.com> | 2007-03-30 12:34:44 -0400 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2007-03-30 12:38:03 -0400 |
| commit | 2cb22e23a5fcbcac2de49493aa57c7694028a06a (patch) | |
| tree | 0e72dd6b1d9fd6457f1e4e2f325a65ec4173e6d6 /arch | |
| parent | 9b50ffb0c0281bc5a08ccd56ae9bb84296c28f38 (diff) | |
[IA64] allow WB /sys/.../legacy_mem mmaps
Allow cacheable mmaps of legacy_mem if WB access is supported for the region.
The "legacy_mem" file often contains a shadow option ROM, and some versions of
X depend on this.
Tim Yamin <plasm@roo.me.uk> reported that this change fixes X on a Dell
PowerEdge 3250.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/ia64/pci/pci.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c index 0e83f3b419b5..9f635896d252 100644 --- a/arch/ia64/pci/pci.c +++ b/arch/ia64/pci/pci.c | |||
| @@ -659,8 +659,6 @@ pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma) | |||
| 659 | return -EINVAL; | 659 | return -EINVAL; |
| 660 | prot = phys_mem_access_prot(NULL, vma->vm_pgoff, size, | 660 | prot = phys_mem_access_prot(NULL, vma->vm_pgoff, size, |
| 661 | vma->vm_page_prot); | 661 | vma->vm_page_prot); |
| 662 | if (pgprot_val(prot) != pgprot_val(pgprot_noncached(vma->vm_page_prot))) | ||
| 663 | return -EINVAL; | ||
| 664 | 662 | ||
| 665 | addr = pci_get_legacy_mem(bus); | 663 | addr = pci_get_legacy_mem(bus); |
| 666 | if (IS_ERR(addr)) | 664 | if (IS_ERR(addr)) |