aboutsummaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/sleep/main.c71
1 files changed, 14 insertions, 57 deletions
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index d2f71a54726c..71183eea7906 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -26,21 +26,6 @@ u8 sleep_states[ACPI_S_STATE_COUNT];
26 26
27#ifdef CONFIG_PM_SLEEP 27#ifdef CONFIG_PM_SLEEP
28static u32 acpi_target_sleep_state = ACPI_STATE_S0; 28static u32 acpi_target_sleep_state = ACPI_STATE_S0;
29static bool acpi_sleep_finish_wake_up;
30
31/*
32 * ACPI 2.0 and later want us to execute _PTS after suspending devices, so we
33 * allow the user to request that behavior by using the 'acpi_new_pts_ordering'
34 * kernel command line option that causes the following variable to be set.
35 */
36static bool new_pts_ordering;
37
38static int __init acpi_new_pts_ordering(char *str)
39{
40 new_pts_ordering = true;
41 return 1;
42}
43__setup("acpi_new_pts_ordering", acpi_new_pts_ordering);
44#endif 29#endif
45 30
46static int acpi_sleep_prepare(u32 acpi_state) 31static int acpi_sleep_prepare(u32 acpi_state)
@@ -91,14 +76,6 @@ static int acpi_pm_begin(suspend_state_t pm_state)
91 76
92 if (sleep_states[acpi_state]) { 77 if (sleep_states[acpi_state]) {
93 acpi_target_sleep_state = acpi_state; 78 acpi_target_sleep_state = acpi_state;
94 if (new_pts_ordering)
95 return 0;
96
97 error = acpi_sleep_prepare(acpi_state);
98 if (error)
99 acpi_target_sleep_state = ACPI_STATE_S0;
100 else
101 acpi_sleep_finish_wake_up = true;
102 } else { 79 } else {
103 printk(KERN_ERR "ACPI does not support this state: %d\n", 80 printk(KERN_ERR "ACPI does not support this state: %d\n",
104 pm_state); 81 pm_state);
@@ -116,14 +93,11 @@ static int acpi_pm_begin(suspend_state_t pm_state)
116 93
117static int acpi_pm_prepare(void) 94static int acpi_pm_prepare(void)
118{ 95{
119 if (new_pts_ordering) { 96 int error = acpi_sleep_prepare(acpi_target_sleep_state);
120 int error = acpi_sleep_prepare(acpi_target_sleep_state);
121 97
122 if (error) { 98 if (error) {
123 acpi_target_sleep_state = ACPI_STATE_S0; 99 acpi_target_sleep_state = ACPI_STATE_S0;
124 return error; 100 return error;
125 }
126 acpi_sleep_finish_wake_up = true;
127 } 101 }
128 102
129 return ACPI_SUCCESS(acpi_hw_disable_all_gpes()) ? 0 : -EFAULT; 103 return ACPI_SUCCESS(acpi_hw_disable_all_gpes()) ? 0 : -EFAULT;
@@ -212,7 +186,6 @@ static void acpi_pm_finish(void)
212 acpi_set_firmware_waking_vector((acpi_physical_address) 0); 186 acpi_set_firmware_waking_vector((acpi_physical_address) 0);
213 187
214 acpi_target_sleep_state = ACPI_STATE_S0; 188 acpi_target_sleep_state = ACPI_STATE_S0;
215 acpi_sleep_finish_wake_up = false;
216 189
217#ifdef CONFIG_X86 190#ifdef CONFIG_X86
218 if (init_8259A_after_S1) { 191 if (init_8259A_after_S1) {
@@ -229,11 +202,10 @@ static void acpi_pm_finish(void)
229static void acpi_pm_end(void) 202static void acpi_pm_end(void)
230{ 203{
231 /* 204 /*
232 * This is necessary in case acpi_pm_finish() is not called directly 205 * This is necessary in case acpi_pm_finish() is not called during a
233 * during a failing transition to a sleep state. 206 * failing transition to a sleep state.
234 */ 207 */
235 if (acpi_sleep_finish_wake_up) 208 acpi_target_sleep_state = ACPI_STATE_S0;
236 acpi_pm_finish();
237} 209}
238 210
239static int acpi_pm_state_valid(suspend_state_t pm_state) 211static int acpi_pm_state_valid(suspend_state_t pm_state)
@@ -285,31 +257,18 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
285#ifdef CONFIG_HIBERNATION 257#ifdef CONFIG_HIBERNATION
286static int acpi_hibernation_begin(void) 258static int acpi_hibernation_begin(void)
287{ 259{
288 int error;
289
290 acpi_target_sleep_state = ACPI_STATE_S4; 260 acpi_target_sleep_state = ACPI_STATE_S4;
291 if (new_pts_ordering)
292 return 0;
293 261
294 error = acpi_sleep_prepare(ACPI_STATE_S4); 262 return 0;
295 if (error)
296 acpi_target_sleep_state = ACPI_STATE_S0;
297 else
298 acpi_sleep_finish_wake_up = true;
299
300 return error;
301} 263}
302 264
303static int acpi_hibernation_prepare(void) 265static int acpi_hibernation_prepare(void)
304{ 266{
305 if (new_pts_ordering) { 267 int error = acpi_sleep_prepare(ACPI_STATE_S4);
306 int error = acpi_sleep_prepare(ACPI_STATE_S4);
307 268
308 if (error) { 269 if (error) {
309 acpi_target_sleep_state = ACPI_STATE_S0; 270 acpi_target_sleep_state = ACPI_STATE_S0;
310 return error; 271 return error;
311 }
312 acpi_sleep_finish_wake_up = true;
313 } 272 }
314 273
315 return ACPI_SUCCESS(acpi_hw_disable_all_gpes()) ? 0 : -EFAULT; 274 return ACPI_SUCCESS(acpi_hw_disable_all_gpes()) ? 0 : -EFAULT;
@@ -353,17 +312,15 @@ static void acpi_hibernation_finish(void)
353 acpi_set_firmware_waking_vector((acpi_physical_address) 0); 312 acpi_set_firmware_waking_vector((acpi_physical_address) 0);
354 313
355 acpi_target_sleep_state = ACPI_STATE_S0; 314 acpi_target_sleep_state = ACPI_STATE_S0;
356 acpi_sleep_finish_wake_up = false;
357} 315}
358 316
359static void acpi_hibernation_end(void) 317static void acpi_hibernation_end(void)
360{ 318{
361 /* 319 /*
362 * This is necessary in case acpi_hibernation_finish() is not called 320 * This is necessary in case acpi_hibernation_finish() is not called
363 * directly during a failing transition to the sleep state. 321 * during a failing transition to the sleep state.
364 */ 322 */
365 if (acpi_sleep_finish_wake_up) 323 acpi_target_sleep_state = ACPI_STATE_S0;
366 acpi_hibernation_finish();
367} 324}
368 325
369static int acpi_hibernation_pre_restore(void) 326static int acpi_hibernation_pre_restore(void)