powerpc/pseries/cpuidle: Remove MAX_IDLE_STATE macro.

This patch removes the usage of MAX_IDLE_STATE macro
and dead code around it. The number of states
are determined at run time based on the cpuidle
state table selected on a given platform

Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 10 insertions, 18 deletions

diff --git a/drivers/cpuidle/cpuidle-pseries.c b/drivers/cpuidle/cpuidle-pseries.c
index 5e13f6ce2271..bb56091685d3 100644
--- a/drivers/cpuidle/cpuidle-pseries.c
+++ b/drivers/cpuidle/cpuidle-pseries.c
@@ -24,9 +24,7 @@ struct cpuidle_driver pseries_idle_driver = {
         .owner            = THIS_MODULE,
 };
 
-#define MAX_IDLE_STATE_COUNT    2
-
-static int max_idle_state = MAX_IDLE_STATE_COUNT - 1;
+static int max_idle_state;
 static struct cpuidle_state *cpuidle_state_table;
 
 static inline void idle_loop_prolog(unsigned long *in_purr)
@@ -134,7 +132,7 @@ static int shared_cede_loop(struct cpuidle_device *dev,
 /*
  * States for dedicated partition case.
  */
-static struct cpuidle_state dedicated_states[MAX_IDLE_STATE_COUNT] = {
+static struct cpuidle_state dedicated_states[] = {
         { /* Snooze */
                 .name = "snooze",
                 .desc = "snooze",
@@ -154,7 +152,7 @@ static struct cpuidle_state dedicated_states[MAX_IDLE_STATE_COUNT] = {
 /*
  * States for shared partition case.
  */
-static struct cpuidle_state shared_states[MAX_IDLE_STATE_COUNT] = {
+static struct cpuidle_state shared_states[] = {
         { /* Shared Cede */
                 .name = "Shared Cede",
                 .desc = "Shared Cede",
@@ -225,12 +223,8 @@ static int pseries_cpuidle_driver_init(void)
 
         drv->state_count = 0;
 
-        for (idle_state = 0; idle_state < MAX_IDLE_STATE_COUNT; ++idle_state) {
-
-                if (idle_state > max_idle_state)
-                        break;
-
-                /* is the state not enabled? */
+        for (idle_state = 0; idle_state < max_idle_state; ++idle_state) {
+                /* Is the state not enabled? */
                 if (cpuidle_state_table[idle_state].enter == NULL)
                         continue;
 
@@ -253,16 +247,14 @@ static int pseries_idle_probe(void)
         if (cpuidle_disable != IDLE_NO_OVERRIDE)
                 return -ENODEV;
 
-        if (max_idle_state == 0) {
-                printk(KERN_DEBUG "pseries processor idle disabled.\n");
-                return -EPERM;
-        }
-
         if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
-                if (lppaca_shared_proc(get_lppaca()))
+                if (lppaca_shared_proc(get_lppaca())) {
                         cpuidle_state_table = shared_states;
-                else
+                        max_idle_state = ARRAY_SIZE(shared_states);
+                } else {
                         cpuidle_state_table = dedicated_states;
+                        max_idle_state = ARRAY_SIZE(dedicated_states);
+                }
         } else
                 return -ENODEV;