treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / arch / sparc / kernel / reboot.c
blob69c1b6c047d53218583d0ad84aa8a20367bb5a01
1 // SPDX-License-Identifier: GPL-2.0
2 /* reboot.c: reboot/shutdown/halt/poweroff handling
4 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
5 */
6 #include <linux/kernel.h>
7 #include <linux/reboot.h>
8 #include <linux/export.h>
9 #include <linux/pm.h>
10 #include <linux/of.h>
12 #include <asm/oplib.h>
13 #include <asm/prom.h>
14 #include <asm/setup.h>
16 /* sysctl - toggle power-off restriction for serial console
17 * systems in machine_power_off()
19 int scons_pwroff = 1;
21 /* This isn't actually used, it exists merely to satisfy the
22 * reference in kernel/sys.c
24 void (*pm_power_off)(void) = machine_power_off;
25 EXPORT_SYMBOL(pm_power_off);
27 void machine_power_off(void)
29 if (!of_node_is_type(of_console_device, "serial") || scons_pwroff)
30 prom_halt_power_off();
32 prom_halt();
35 void machine_halt(void)
37 prom_halt();
38 panic("Halt failed!");
41 void machine_restart(char *cmd)
43 char *p;
45 p = strchr(reboot_command, '\n');
46 if (p)
47 *p = 0;
48 if (cmd)
49 prom_reboot(cmd);
50 if (*reboot_command)
51 prom_reboot(reboot_command);
52 prom_reboot("");
53 panic("Reboot failed!");