From d5847bf59443ef54c838fe5be1ecd47443c7807b Mon Sep 17 00:00:00 2001
From: Ignat Korchagin <ignat@cloudflare.com>
Date: Fri, 24 Jul 2015 20:46:02 +0300
Subject: [PATCH] efi: fix GetVariable return status check in 81ca24a

GetVariable should return EFI_BUFFER_TOO_SMALL if given buffer of size
zero; commit incorrectly checked for EFI_SUCCESS.
---
 grub-core/kern/efi/efi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
index 490edefe5..caf9bcc41 100644
--- a/grub-core/kern/efi/efi.c
+++ b/grub-core/kern/efi/efi.c
@@ -238,7 +238,7 @@ grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid,
 
   status = efi_call_5 (r->get_variable, var16, guid, NULL, &datasize, NULL);
 
-  if (status != GRUB_EFI_SUCCESS || !datasize)
+  if (status != GRUB_EFI_BUFFER_TOO_SMALL || !datasize)
     {
       grub_free (var16);
       return NULL;