Try to detect an unsuccessful hard-reboot to prevent soft-reboot loops.

There have been various kvm bugs that prevent reboots from working
properly.  Generalize the existing test for a failed reboot to better
catch these cases.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/resume.c b/src/resume.c
index 784abac0..94664803 100644
--- a/src/resume.c
+++ b/src/resume.c
@@ -123,10 +123,19 @@ s3_resume(void)
     farcall16big(&br);
 }
 
+u8 HaveAttemptedReboot VARLOW;
+
 // Attempt to invoke a hard-reboot.
 static void
 tryReboot(void)
 {
+    if (HaveAttemptedReboot) {
+        // Hard reboot has failed - try to shutdown machine.
+        dprintf(1, "Unable to hard-reboot machine - attempting shutdown.\n");
+        apm_shutdown();
+    }
+    HaveAttemptedReboot = 1;
+
     dprintf(1, "Attempting a hard reboot\n");
 
     // Setup for reset on qemu.