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efi: Use EFI ResetSystem only when available 

Do not attempt to call EFI ResetSystem if the runtime supported mask tells
us it is no longer functional at OS runtime.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Ard Biesheuvel 2020-01-23 13:12:14 +01:00
parent 69f4cab134
commit 9b42f76ad5
1 changed files with 2 additions and 2 deletions
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4
drivers/firmware/efi/reboot.c
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@ -15,7 +15,7 @@ void efi_reboot(enum reboot_mode reboot_mode, const char *__unused)
const char *str[] = { "cold", "warm", "shutdown", "platform" };
int efi_mode, cap_reset_mode;
if (!efi_enabled(EFI_RUNTIME_SERVICES))
if (!efi_rt_services_supported(EFI_RT_SUPPORTED_RESET_SYSTEM))
return;
switch (reboot_mode) {
@ -64,7 +64,7 @@ static void efi_power_off(void)
static int __init efi_shutdown_init(void)
{
if (!efi_enabled(EFI_RUNTIME_SERVICES))
if (!efi_rt_services_supported(EFI_RT_SUPPORTED_RESET_SYSTEM))
return -ENODEV;
if (efi_poweroff_required()) {