During early boot phase, PCI bus subsystem is not yet initialized.
If panic is occured in early boot phase and panic_timeout is set,
code flow go into emergency_restart() and hit mach_reboot_fixups(), then
encounter another panic. When second panic, we can't hold a panic_lock, so
code flow go into panic_smp_self_stop() which prevent system to restart.
For avoid second panic, skip reboot_fixups in early boot phase.
It makes panic_timeout works in early boot phase.
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: "H. Peter Anvin" <h...@zytor.com>
Signed-off-by: Joonsoo Kim <js1...@gmail.com>
diff --git a/arch/x86/kernel/reboot_fixups_32.c
b/arch/x86/kernel/reboot_fixups_32.c
index c8e41e9..b9b8ec9 100644
--- a/arch/x86/kernel/reboot_fixups_32.c
+++ b/arch/x86/kernel/reboot_fixups_32.c
@@ -89,6 +89,10 @@ void mach_reboot_fixups(void)
if (in_interrupt())
return;
+ /* During early boot phase, PCI is not yet initialized */
+ if (system_state == SYSTEM_BOOTING)
+ return;
+
for (i=0; i < ARRAY_SIZE(fixups_table); i++) {
cur = &(fixups_table[i]);
dev = pci_get_device(cur->vendor, cur->device, NULL);
--
1.7.9.5
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