From: Helge Deller <deller@gmx.de>
Date: Mon, 22 May 2023 20:57:30 +0000 (+0200)
Subject: parisc: Allow to reboot machine after system halt
X-Git-Tag: baikal/aarch64/sdk5.10~32
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=c1578fee59ebf2858977b686e6bbcb91f546daaa;p=kernel.git

parisc: Allow to reboot machine after system halt

commit 2028315cf59bb899a5ac7e87dc48ecb8fac7ac24 upstream.

In case a machine can't power-off itself on system shutdown,
allow the user to reboot it by pressing the RETURN key.

Cc: <stable@vger.kernel.org> # v4.14+
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index 230a6422b99f3..0e67ab681b4e9 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -124,13 +124,18 @@ void machine_power_off(void)
 	/* It seems we have no way to power the system off via
 	 * software. The user has to press the button himself. */
 
-	printk(KERN_EMERG "System shut down completed.\n"
-	       "Please power this system off now.");
+	printk("Power off or press RETURN to reboot.\n");
 
 	/* prevent soft lockup/stalled CPU messages for endless loop. */
 	rcu_sysrq_start();
 	lockup_detector_soft_poweroff();
-	for (;;);
+	while (1) {
+		/* reboot if user presses RETURN key */
+		if (pdc_iodc_getc() == 13) {
+			printk("Rebooting...\n");
+			machine_restart(NULL);
+		}
+	}
 }
 
 void (*pm_power_off)(void);