From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Javier Martinez Canillas <javierm@redhat.com>
Date: Tue, 9 Apr 2019 12:30:38 +0200
Subject: [PATCH] Fix systemctl kexec exit status check

There's always an error printed even when the systemctl kexec command does
succeed. That's because systemctl executes it asynchronously, but the emu
loader seems to expect it to be synchronous and that should never return.

Also, it's wrong to test if kexecute == 1 since we already know that's the
case or otherwise the function wouldn't had called grub_fatal() earlier.

Finally, systemctl kexec failing shouldn't be a fatal error since the emu
loader fallbacks to executing the kexec command in case of a failure.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
---
 grub-core/loader/emu/linux.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/grub-core/loader/emu/linux.c b/grub-core/loader/emu/linux.c
index fda9e00d24c..5b85b225eed 100644
--- a/grub-core/loader/emu/linux.c
+++ b/grub-core/loader/emu/linux.c
@@ -71,8 +71,10 @@ grub_linux_boot (void)
 		(kexecute==1) ? "do-or-die" : "just-in-case");
   rc = grub_util_exec (systemctl);
 
-  if (kexecute == 1)
-    grub_fatal (N_("Error trying to perform 'systemctl kexec'"));
+  if (rc == GRUB_ERR_NONE)
+    return rc;
+
+  grub_error (rc, N_("Error trying to perform 'systemctl kexec'"));
 
   /* need to check read-only root before resetting hard!? */
   grub_printf("Performing 'kexec -e'");