Messages in this thread Patch in this message | | | From | Matthew Garrett <> | Subject | [PATCH 5/5] efi: Ensure that the entirity of a region is mapped | Date | Thu, 5 May 2011 15:19:46 -0400 |
| |
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> --- 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 94d6b39..2649426 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); } -- 1.7.5
| |