cpufreq: intel_pstate: Simplify P state adjustment logic.

Simplify the code by removing the inline functions pstate_increase and
pstate_decrease and use directly the intel_pstate_set_pstate.
Signed-off-by: NStratos Karafotis <stratosk@semaphore.gr>
Acked-by: NDirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/intel_pstate.c

@@ -530,21 +530,6 @@ static void intel_pstate_set_pstate(struct cpudata *cpu, int pstate)
 	pstate_funcs.set(cpu, pstate);
 }
 
-static inline void intel_pstate_pstate_increase(struct cpudata *cpu, int steps)
-{
-	int target;
-	target = cpu->pstate.current_pstate + steps;
-
-	intel_pstate_set_pstate(cpu, target);
-}
-
-static inline void intel_pstate_pstate_decrease(struct cpudata *cpu, int steps)
-{
-	int target;
-	target = cpu->pstate.current_pstate - steps;
-	intel_pstate_set_pstate(cpu, target);
-}
-
 static void intel_pstate_get_cpu_pstates(struct cpudata *cpu)
 {
 	cpu->pstate.min_pstate = pstate_funcs.get_min();
@@ -632,20 +617,15 @@ static inline void intel_pstate_adjust_busy_pstate(struct cpudata *cpu)
 {
 	int32_t busy_scaled;
 	struct _pid *pid;
-	signed int ctl = 0;
-	int steps;
+	signed int ctl;
 
 	pid = &cpu->pid;
 	busy_scaled = intel_pstate_get_scaled_busy(cpu);
 
 	ctl = pid_calc(pid, busy_scaled);
 
-	steps = abs(ctl);
-
-	if (ctl < 0)
-		intel_pstate_pstate_increase(cpu, steps);
-	else
-		intel_pstate_pstate_decrease(cpu, steps);
+	/* Negative values of ctl increase the pstate and vice versa */
+	intel_pstate_set_pstate(cpu, cpu->pstate.current_pstate - ctl);
 }
 
 static void intel_pstate_timer_func(unsigned long __data)