linux-kernel - [PATCH] PM: ACPI: reboot: Reinstate S5 for reboot

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Date:   Mon,  5 Sep 2022 15:15:58 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     rafael.j.wysocki@...el.com
Cc:     Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Josef Bacik <josef@...icpanda.com>,
        Dmitry Osipenko <dmitry.osipenko@...labora.com>,
        Petr Mladek <pmladek@...e.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        tangmeng <tangmeng@...ontech.com>,
        YueHaibing <yuehaibing@...wei.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] PM: ACPI: reboot: Reinstate S5 for reboot

Commit d60cd06331a3 ("PM: ACPI: reboot: Use S5 for reboot") caused Dell
PowerEdge r440 hangs at boot.

The issue is fixed by commit 2ca1c94ce0b6 ("tg3: Disable tg3 device on
system reboot to avoid triggering AER"), so reinstate the patch again.

Cc: Josef Bacik <josef@...icpanda.com>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
---
 kernel/reboot.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/reboot.c b/kernel/reboot.c
index 3c35445bf5ad3..c0b89007f0d1b 100644
--- a/kernel/reboot.c
+++ b/kernel/reboot.c
@@ -254,6 +254,8 @@ void migrate_to_reboot_cpu(void)
 void kernel_restart(char *cmd)
 {
 	kernel_restart_prepare(cmd);
+	if (pm_power_off_prepare)
+		pm_power_off_prepare();
 	migrate_to_reboot_cpu();
 	syscore_shutdown();
 	if (!cmd)
-- 
2.36.1