diff options
| author | Paul Mackerras <paulus@samba.org> | 2008-05-09 20:12:06 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-05-09 20:12:06 +1000 |
| commit | 2a5f2e3e6cd1ce9fb3f8b186b6bc9aa1f1497a92 (patch) | |
| tree | b2306840f227972a7c9d4a2b75e516fe81358ce8 /arch/x86/pci/i386.c | |
| parent | 02539d71fa98d5737bb668b02286c76241e4bac9 (diff) | |
| parent | 78be76476a34a77f0ea9db2f78ba46a2b0fd5ab5 (diff) | |
Merge branch 'for-2.6.26' of master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx into merge
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); |