[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>

1 files changed, 6 insertions, 4 deletions

diff --git a/arch/mips/kernel/reset.c b/arch/mips/kernel/reset.c
index ae2ba67b7ef6..a131aa0cbe66 100644
--- 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();
 }
-