efi: fix booting failure with UEFI on ARM

Commit 9fd08b4 (efi: split out efi_get_gop()) splits out the
codes getting the pointer to GOP as efi_get_gop(), but it doesn't
initialize the variable handles and gop to NULL like what the original
codes do. This will cause booting failure on ARM while printing below
logs:
	Xen 4.7-unstable (c/s Tue Oct 13 14:40:28 2015 +0100 git:7a92036) EFI loader
	Synchronous Exception at 0x00000000FECB021C

Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Acked-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>

diff --git a/xen/common/efi/boot.c b/xen/common/efi/boot.c
index 005bb2b7a1b4783711499666de6764fb21252a7e..53c7452e5087535ffe9573e7a34e727058ac7434 100644 (file)
--- a/xen/common/efi/boot.c
+++ b/xen/common/efi/boot.c
@@ -635,8 +635,8 @@ static void __init efi_console_set_mode(void)
 static EFI_GRAPHICS_OUTPUT_PROTOCOL __init *efi_get_gop(void)
 {
     EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *mode_info;
-    EFI_GRAPHICS_OUTPUT_PROTOCOL *gop;
-    EFI_HANDLE *handles;
+    EFI_GRAPHICS_OUTPUT_PROTOCOL *gop = NULL;
+    EFI_HANDLE *handles = NULL;
     EFI_STATUS status;
     UINTN info_size, size = 0;
     static EFI_GUID __initdata gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;