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authorMatthew Garrett <mjg@redhat.com>2011-05-05 15:19:46 -0400
committerH. Peter Anvin <hpa@linux.intel.com>2011-05-09 12:14:45 -0700
commit935a638241b0658b9749edd060f972575f9d4a78 (patch)
tree9164331a5d442e2e4b3062c3c247a298aa2ba8d5
parent7cb00b72876ea2451eb79d468da0e8fb9134aa8a (diff)
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.c6
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 94d6b394b65..2649426a790 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);
}