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| author | Venki Pallipadi <venkatesh.pallipadi@intel.com> | 2008-03-24 22:39:55 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-17 17:41:20 +0200 |
| commit | dee7cbb210fdd266ad81af4689bcbac3649f38ff (patch) | |
| tree | 2103ffc28bba2516003609026c649aa1e7592ad2 /arch/x86/mm/ioremap.c | |
| parent | x86: pat cpu feature bit setting for known cpus (diff) | |
| download | linux-dee7cbb210fdd266ad81af4689bcbac3649f38ff.tar.xz linux-dee7cbb210fdd266ad81af4689bcbac3649f38ff.zip | |
x86: PAT bug fix for attribute type check after reserve_memtype
Bug fixes for reserve_memtype() call in __ioremap and pci_mmap_page_range().
If reserve_memtype returns non-zero, then it is an error and subsequent free is
not required. Requested and returned prot value check should be done when
reserve_memtype returns success.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/mm/ioremap.c')
| -rw-r--r-- | arch/x86/mm/ioremap.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index 6cd3418afe71..3f7f05e2c434 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -124,6 +124,7 @@ static void __iomem *__ioremap(resource_size_t phys_addr, unsigned long size, struct vm_struct *area; unsigned long new_prot_val; pgprot_t prot; + int retval; /* Don't allow wraparound or zero size */ last_addr = phys_addr + size - 1; @@ -163,8 +164,14 @@ static void __iomem *__ioremap(resource_size_t phys_addr, unsigned long size, phys_addr &= PAGE_MASK; size = PAGE_ALIGN(last_addr+1) - phys_addr; - if (reserve_memtype(phys_addr, phys_addr + size, - prot_val, &new_prot_val)) { + retval = reserve_memtype(phys_addr, phys_addr + size, + prot_val, &new_prot_val); + if (retval) { + printk("reserve_memtype returned %d\n", retval); + return NULL; + } + + if (prot_val != new_prot_val) { /* * Do not fallback to certain memory types with certain * requested type: |