parisc/power: Add power soft-off when running on qemu

commit d0c219472980d15f5cbc5c8aec736848bda3f235 upstream.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v6.0+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/parisc/power.c b/drivers/parisc/power.c
index 6f5e5f0..6ee0717 100644 (file)
--- a/drivers/parisc/power.c
+++ b/drivers/parisc/power.c
@@ -197,6 +197,14 @@ static struct notifier_block parisc_panic_block = {
        .priority       = INT_MAX,
 };
 
+/* qemu soft power-off function */
+static int qemu_power_off(struct sys_off_data *data)
+{
+       /* this turns the system off via SeaBIOS */
+       *(int *)data->cb_data = 0;
+       pdc_soft_power_button(1);
+       return NOTIFY_DONE;
+}
 
 static int __init power_init(void)
 {
@@ -226,7 +234,13 @@ static int __init power_init(void)
                                soft_power_reg);
        }
 
-       power_task = kthread_run(kpowerswd, (void*)soft_power_reg, KTHREAD_NAME);
+       power_task = NULL;
+       if (running_on_qemu && soft_power_reg)
+               register_sys_off_handler(SYS_OFF_MODE_POWER_OFF, SYS_OFF_PRIO_DEFAULT,
+                                       qemu_power_off, (void *)soft_power_reg);
+       else
+               power_task = kthread_run(kpowerswd, (void*)soft_power_reg,
+                                       KTHREAD_NAME);
        if (IS_ERR(power_task)) {
                printk(KERN_ERR DRIVER_NAME ": thread creation failed.  Driver not loaded.\n");
                pdc_soft_power_button(0);