diff options
| author | Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2009-07-10 16:57:33 (GMT) |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-08-26 22:41:07 (GMT) |
| commit | 279e669b3fc0068cc3509e8e53036999e1e86588 (patch) | |
| tree | 58b1dc1836b2c138ad765579ad202b25e00036d8 /arch/x86/mm | |
| parent | 5fc517466dd3d0fc6d2a5180ca6792e60344d8be (diff) | |
| download | linux-279e669b3fc0068cc3509e8e53036999e1e86588.tar.xz | |
x86, pat: ioremap to follow same PAT restrictions as other PAT users
ioremap has this hard-coded check for new type and requested type. That
check differs from other PAT users like /dev/mem mmap, remap_pfn_range
in only one condition where requested type is UC_MINUS and new type
is WC. Under that condition, ioremap fails. But other PAT interfaces succeed
with a WC mapping.
Change to make ioremap be in sync with other PAT APIs and use the same
macro as others. Also changes the error print to KERN_ERR instead of
pr_debug.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/ioremap.c | 17 |
1 files changed, 3 insertions, 14 deletions
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index 8a45093..aeaea8c 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -228,24 +228,13 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr, retval = reserve_memtype(phys_addr, (u64)phys_addr + size, prot_val, &new_prot_val); if (retval) { - pr_debug("Warning: reserve_memtype returned %d\n", retval); + printk(KERN_ERR "ioremap reserve_memtype failed %d\n", retval); return NULL; } if (prot_val != new_prot_val) { - /* - * Do not fallback to certain memory types with certain - * requested type: - * - request is uc-, return cannot be write-back - * - request is uc-, return cannot be write-combine - * - request is write-combine, return cannot be write-back - */ - if ((prot_val == _PAGE_CACHE_UC_MINUS && - (new_prot_val == _PAGE_CACHE_WB || - new_prot_val == _PAGE_CACHE_WC)) || - (prot_val == _PAGE_CACHE_WC && - new_prot_val == _PAGE_CACHE_WB)) { - pr_debug( + if (!is_new_memtype_allowed(prot_val, new_prot_val)) { + printk(KERN_ERR "ioremap error for 0x%llx-0x%llx, requested 0x%lx, got 0x%lx\n", (unsigned long long)phys_addr, (unsigned long long)(phys_addr + size), |