From 2cb22e23a5fcbcac2de49493aa57c7694028a06a Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Fri, 30 Mar 2007 10:34:44 -0600 Subject: [PATCH] [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 reported that this change fixes X on a Dell PowerEdge 3250. Signed-off-by: Bjorn Helgaas Signed-off-by: Tony Luck --- arch/ia64/pci/pci.c | 2 -- 1 file changed, 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)) -- 2.11.4.GIT