aboutsummaryrefslogtreecommitdiff
path: root/arch/ia64/pci
diff options
context:
space:
mode:
authorBjorn Helgaas <bjorn.helgaas@hp.com>2007-03-30 10:34:44 -0600
committerTony Luck <tony.luck@intel.com>2007-03-30 09:38:03 -0700
commit2cb22e23a5fcbcac2de49493aa57c7694028a06a (patch)
tree0e72dd6b1d9fd6457f1e4e2f325a65ec4173e6d6 /arch/ia64/pci
parent9b50ffb0c0281bc5a08ccd56ae9bb84296c28f38 (diff)
downloadlinux-linaro-2cb22e23a5fcbcac2de49493aa57c7694028a06a.tar.gz
[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/ia64/pci')
-rw-r--r--arch/ia64/pci/pci.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 0e83f3b419b..9f635896d25 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)
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))