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parisc: Allow to reboot machine after system halt

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commit 2028315cf5 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>
This commit is contained in:
Helge Deller
2023-05-22 22:57:30 +02:00
committed by Greg Kroah-Hartman
parent c49ffd89b6
commit d935edd510
1 changed files with 8 additions and 3 deletions
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11
arch/parisc/kernel/process.c
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@@ -122,13 +122,18 @@ void machine_power_off(void)
/* It seems we have no way to power the system off via /* It seems we have no way to power the system off via
* software. The user has to press the button himself. */ * software. The user has to press the button himself. */
printk(KERN_EMERG "System shut down completed.\n" printk("Power off or press RETURN to reboot.\n");
"Please power this system off now.");
/* prevent soft lockup/stalled CPU messages for endless loop. */ /* prevent soft lockup/stalled CPU messages for endless loop. */
rcu_sysrq_start(); rcu_sysrq_start();
lockup_detector_soft_poweroff(); 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); void (*pm_power_off)(void);