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| author | Matthew Garrett <mjg@redhat.com> | 2011-05-05 21:19:46 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2011-05-09 21:14:45 +0200 |
| commit | 935a638241b0658b9749edd060f972575f9d4a78 (patch) | |
| tree | 9164331a5d442e2e4b3062c3c247a298aa2ba8d5 | |
| parent | x86, efi: Pass a minimal map to SetVirtualAddressMap() (diff) | |
| download | linux-935a638241b0658b9749edd060f972575f9d4a78.tar.xz linux-935a638241b0658b9749edd060f972575f9d4a78.zip | |
x86, efi: Ensure that the entirity of a region is mapped
It's possible for init_memory_mapping() to fail to map the entire region
if it crosses a boundary, so ensure that we complete the mapping.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Link: http://lkml.kernel.org/r/1304623186-18261-5-git-send-email-mjg@redhat.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| -rw-r--r-- | arch/x86/platform/efi/efi_64.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c index 94d6b394b654..2649426a7905 100644 --- a/arch/x86/platform/efi/efi_64.c +++ b/arch/x86/platform/efi/efi_64.c @@ -89,8 +89,10 @@ void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size, return ioremap(phys_addr, size); last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size); - if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size) - return NULL; + if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size) { + unsigned long top = last_map_pfn << PAGE_SHIFT; + efi_ioremap(top, size - (top - phys_addr), type); + } return (void __iomem *)__va(phys_addr); } |