[MIPS] Check function pointers are non-zero before calling.

Several boards don't initialize the pointers, so let's play safe.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/reset.c b/arch/mips/kernel/reset.c
index ae2ba67b7ef61f1054f8f5f19f625d3f78b5f6ed..a131aa0cbe66d8a56f96208820761d778256b5ce 100644 (file)
--- a/arch/mips/kernel/reset.c
+++ b/arch/mips/kernel/reset.c
@@ -23,16 +23,18 @@ void (*_machine_power_off)(void);
 
 void machine_restart(char *command)
 {
-       _machine_restart(command);
+       if (_machine_restart)
+               _machine_restart(command);
 }
 
 void machine_halt(void)
 {
-       _machine_halt();
+       if (_machine_halt)
+               _machine_halt();
 }
 
 void machine_power_off(void)
 {
-       _machine_power_off();
+       if (_machine_power_off)
+               _machine_power_off();
 }
-