efi: Suspicious size reduction in emalloc

It could happen on 32 bits architecture that the memory size really allocated
could be less than required. On 64 bits, allocate_pages may be called
more times than needed.

This closes bug #39.

Signed-off-by: Sylvain Gault <sylvain.gault@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/efi/main.c b/efi/main.c
index 0e6b1370..94878f93 100644
--- a/efi/main.c
+++ b/efi/main.c
@@ -691,10 +691,8 @@ EFI_STATUS emalloc(UINTN size, UINTN align, EFI_PHYSICAL_ADDRESS *addr)
 		/* Low-memory is super-precious! */
 		if (end <= 1 << 20)
 			continue;
-		if (start < 1 << 20) {
-			size -= (1 << 20) - start;
+		if (start < 1 << 20)
 			start = (1 << 20);
-		}
 
 		aligned = (start + align -1) & ~(align -1);