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| author | Richard Weinberger <richard@nod.at> | 2013-04-10 12:59:34 +0400 |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2013-04-11 18:45:52 +0400 |
| commit | 7791c8423f1f7f4dad94e753bae67461d5b80be8 (patch) | |
| tree | 54b619a807a75adef8551f1db76250b22b151f8f | |
| parent | a6e4d5a03e9e3587e88aba687d8f225f4f04c792 (diff) | |
| download | linux-7791c8423f1f7f4dad94e753bae67461d5b80be8.tar.xz | |
x86,efi: Check max_size only if it is non-zero.
Some EFI implementations return always a MaximumVariableSize of 0,
check against max_size only if it is non-zero.
My Intel DQ67SW desktop board has such an implementation.
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
| -rw-r--r-- | arch/x86/platform/efi/efi.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index c89c245eff40..3f96a487aa2a 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -1018,7 +1018,12 @@ efi_status_t efi_query_variable_store(u32 attributes, unsigned long size) if (status != EFI_SUCCESS) return status; - if (!storage_size || size > remaining_size || size > max_size || + if (!max_size && remaining_size > size) + printk_once(KERN_ERR FW_BUG "Broken EFI implementation" + " is returning MaxVariableSize=0\n"); + + if (!storage_size || size > remaining_size || + (max_size && size > max_size) || (remaining_size - size) < (storage_size / 2)) return EFI_OUT_OF_RESOURCES; |