Commit 2cb22e23 authored Mar 30, 2007 by Bjorn Helgaas Committed by Tony Luck Mar 30, 2007

[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>

parent 9b50ffb0

arch/ia64/pci/pci.c

+0 −2

Original line number	Diff line number	Diff line
		@@ -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))

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