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-rw-r--r--drivers/cpuidle/cpuidle-pseries.c28
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 = {
24 .owner = THIS_MODULE, 24 .owner = THIS_MODULE,
25}; 25};
26 26
27#define MAX_IDLE_STATE_COUNT 2 27static int max_idle_state;
28
29static int max_idle_state = MAX_IDLE_STATE_COUNT - 1;
30static struct cpuidle_state *cpuidle_state_table; 28static struct cpuidle_state *cpuidle_state_table;
31 29
32static inline void idle_loop_prolog(unsigned long *in_purr) 30static inline void idle_loop_prolog(unsigned long *in_purr)
@@ -134,7 +132,7 @@ static int shared_cede_loop(struct cpuidle_device *dev,
134/* 132/*
135 * States for dedicated partition case. 133 * States for dedicated partition case.
136 */ 134 */
137static struct cpuidle_state dedicated_states[MAX_IDLE_STATE_COUNT] = { 135static struct cpuidle_state dedicated_states[] = {
138 { /* Snooze */ 136 { /* Snooze */
139 .name = "snooze", 137 .name = "snooze",
140 .desc = "snooze", 138 .desc = "snooze",
@@ -154,7 +152,7 @@ static struct cpuidle_state dedicated_states[MAX_IDLE_STATE_COUNT] = {
154/* 152/*
155 * States for shared partition case. 153 * States for shared partition case.
156 */ 154 */
157static struct cpuidle_state shared_states[MAX_IDLE_STATE_COUNT] = { 155static struct cpuidle_state shared_states[] = {
158 { /* Shared Cede */ 156 { /* Shared Cede */
159 .name = "Shared Cede", 157 .name = "Shared Cede",
160 .desc = "Shared Cede", 158 .desc = "Shared Cede",
@@ -225,12 +223,8 @@ static int pseries_cpuidle_driver_init(void)
225 223
226 drv->state_count = 0; 224 drv->state_count = 0;
227 225
228 for (idle_state = 0; idle_state < MAX_IDLE_STATE_COUNT; ++idle_state) { 226 for (idle_state = 0; idle_state < max_idle_state; ++idle_state) {
229 227 /* Is the state not enabled? */
230 if (idle_state > max_idle_state)
231 break;
232
233 /* is the state not enabled? */
234 if (cpuidle_state_table[idle_state].enter == NULL) 228 if (cpuidle_state_table[idle_state].enter == NULL)
235 continue; 229 continue;
236 230
@@ -253,16 +247,14 @@ static int pseries_idle_probe(void)
253 if (cpuidle_disable != IDLE_NO_OVERRIDE) 247 if (cpuidle_disable != IDLE_NO_OVERRIDE)
254 return -ENODEV; 248 return -ENODEV;
255 249
256 if (max_idle_state == 0) {
257 printk(KERN_DEBUG "pseries processor idle disabled.\n");
258 return -EPERM;
259 }
260
261 if (firmware_has_feature(FW_FEATURE_SPLPAR)) { 250 if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
262 if (lppaca_shared_proc(get_lppaca())) 251 if (lppaca_shared_proc(get_lppaca())) {
263 cpuidle_state_table = shared_states; 252 cpuidle_state_table = shared_states;
264 else 253 max_idle_state = ARRAY_SIZE(shared_states);
254 } else {
265 cpuidle_state_table = dedicated_states; 255 cpuidle_state_table = dedicated_states;
256 max_idle_state = ARRAY_SIZE(dedicated_states);
257 }
266 } else 258 } else
267 return -ENODEV; 259 return -ENODEV;
268 260