diff options
| author | Steve French <sfrench@us.ibm.com> | 2008-05-06 17:55:32 +0000 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2008-05-06 17:55:32 +0000 |
| commit | a815752ac0ffdb910e92958d41d28f4fb28e5296 (patch) | |
| tree | a3aa16a282354da0debe8e3a3a7ed8aac6e54001 /arch/x86/pci/i386.c | |
| parent | 5ade9deaaa3e1f7291467d97b238648e43eae15e (diff) | |
| parent | a15306365a16380f3bafee9e181ba01231d4acd7 (diff) | |
Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'arch/x86/pci/i386.c')
| -rw-r--r-- | arch/x86/pci/i386.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index 94f6c73a53d..8af0f0bae2a 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -301,6 +301,13 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, prot = pgprot_val(vma->vm_page_prot); if (pat_wc_enabled && write_combine) prot |= _PAGE_CACHE_WC; + else if (pat_wc_enabled) + /* + * ioremap() and ioremap_nocache() defaults to UC MINUS for now. + * To avoid attribute conflicts, request UC MINUS here + * aswell. + */ + prot |= _PAGE_CACHE_UC_MINUS; else if (boot_cpu_data.x86 > 3) prot |= _PAGE_CACHE_UC; @@ -319,9 +326,8 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, * - request is uncached, return cannot be write-combine * - request is write-combine, return cannot be write-back */ - if ((flags == _PAGE_CACHE_UC && - (new_flags == _PAGE_CACHE_WB || - new_flags == _PAGE_CACHE_WC)) || + if ((flags == _PAGE_CACHE_UC_MINUS && + (new_flags == _PAGE_CACHE_WB)) || (flags == _PAGE_CACHE_WC && new_flags == _PAGE_CACHE_WB)) { free_memtype(addr, addr+len); |