From: Leif Lindholm <leif.lindholm@linaro.org>
Date: Fri, 23 May 2014 13:16:56 +0000 (+0100)
Subject: arm64: efi: only attempt efi map setup if booting via EFI
X-Git-Tag: v3.16-rc1~82^2~14^2
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=74bcc2499291d38b6253f9dbd6af33a195222208;p=~emulex%2Finfiniband.git

arm64: efi: only attempt efi map setup if booting via EFI

Booting a kernel with CONFIG_EFI enabled on a non-EFI system caused
an oops with the current UEFI support code.
Add the required test to prevent this.

Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
---

diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c
index 7bfd6509721..14db1f6e8d7 100644
--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -333,6 +333,9 @@ void __init efi_init(void)
 
 void __init efi_idmap_init(void)
 {
+	if (!efi_enabled(EFI_BOOT))
+		return;
+
 	/* boot time idmap_pg_dir is incomplete, so fill in missing parts */
 	efi_setup_idmap();
 }