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[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>
This commit is contained in:
Bjorn Helgaas 2007-03-30 10:34:44 -06:00 committed by Tony Luck
parent 9b50ffb0c0
commit 2cb22e23a5
1 changed files with 0 additions and 2 deletions
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2
arch/ia64/pci/pci.c
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@ -659,8 +659,6 @@ pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma)
return -EINVAL;
prot = phys_mem_access_prot(NULL, vma->vm_pgoff, size,
vma->vm_page_prot);
if (pgprot_val(prot) != pgprot_val(pgprot_noncached(vma->vm_page_prot)))
return -EINVAL;
addr = pci_get_legacy_mem(bus);
if (IS_ERR(addr))