16.9 Reference to function pointer or not

[hele]

Code:

typedef void (*fp)(STATE_MACHINE *sm, EVENT input);
struct STATE_MACHINE_
{
  fp fp_cur_state;
};

void stm_Startup   (STATE_MACHINE *sm,  EVENT input);

Code:

STM_STATE_MACHINE *sm;
sm->fp_cur_state = &stm_Startup;

or

Code:

sm->fp_cur_state = stm_Startup;

??

I have two tools to check code for Misra C.
Checking version without & to the function pointer with Tastking I get the error:

MISRA-C rule 16.9 violation: [R] function calls with no parameters should have empty parentheses

What in fact means the exact rule (I guess):

MISRA-C rule 16.9 violation: [R] A function identifier shall only be used with either a preceding &, or with a parenthesised parameter list, which may be empty.

checking with PC-Lint with & I get

sm->fp_cur_state = &stm_Startup;
stateMachine.c 72 Warning 546: Suspicious use of &

What's right? I guess functionality should be the same in both cases.