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-rw-r--r--kernel/power/Makefile2
-rw-r--r--kernel/power/console.c6
-rw-r--r--kernel/power/disk.c155
-rw-r--r--kernel/power/main.c63
-rw-r--r--kernel/power/snapshot.c9
-rw-r--r--kernel/power/swap.c5
-rw-r--r--kernel/power/swsusp.c18
-rw-r--r--kernel/power/user.c8
8 files changed, 170 insertions, 96 deletions
diff --git a/kernel/power/Makefile b/kernel/power/Makefile
index d7a10167a25..720ea4f781b 100644
--- a/kernel/power/Makefile
+++ b/kernel/power/Makefile
@@ -3,7 +3,7 @@ ifeq ($(CONFIG_PM_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG
endif
-obj-y := main.o
+obj-$(CONFIG_PM) += main.o
obj-$(CONFIG_PM_SLEEP) += console.o
obj-$(CONFIG_FREEZER) += process.o
obj-$(CONFIG_HIBERNATION) += swsusp.o disk.o snapshot.o swap.o user.o
diff --git a/kernel/power/console.c b/kernel/power/console.c
index b8628be2a46..a3961b205de 100644
--- a/kernel/power/console.c
+++ b/kernel/power/console.c
@@ -78,6 +78,12 @@ void pm_restore_console(void)
}
set_console(orig_fgconsole);
release_console_sem();
+
+ if (vt_waitactive(orig_fgconsole)) {
+ pr_debug("Resume: Can't switch VCs.");
+ return;
+ }
+
kmsg_redirect = orig_kmsg;
}
#endif
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index 432ee575c9e..5f21ab2bbcd 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -22,6 +22,7 @@
#include <linux/console.h>
#include <linux/cpu.h>
#include <linux/freezer.h>
+#include <asm/suspend.h>
#include "power.h"
@@ -214,7 +215,7 @@ static int create_image(int platform_mode)
return error;
device_pm_lock();
- local_irq_disable();
+
/* At this point, device_suspend() has been called, but *not*
* device_power_down(). We *must* call device_power_down() now.
* Otherwise, drivers for some devices (e.g. interrupt controllers)
@@ -225,6 +226,24 @@ static int create_image(int platform_mode)
if (error) {
printk(KERN_ERR "PM: Some devices failed to power down, "
"aborting hibernation\n");
+ goto Unlock;
+ }
+
+ error = platform_pre_snapshot(platform_mode);
+ if (error || hibernation_test(TEST_PLATFORM))
+ goto Platform_finish;
+
+ error = disable_nonboot_cpus();
+ if (error || hibernation_test(TEST_CPUS)
+ || hibernation_testmode(HIBERNATION_TEST))
+ goto Enable_cpus;
+
+ local_irq_disable();
+
+ sysdev_suspend(PMSG_FREEZE);
+ if (error) {
+ printk(KERN_ERR "PM: Some devices failed to power down, "
+ "aborting hibernation\n");
goto Enable_irqs;
}
@@ -241,15 +260,28 @@ static int create_image(int platform_mode)
restore_processor_state();
if (!in_suspend)
platform_leave(platform_mode);
+
Power_up:
+ sysdev_resume();
/* NOTE: device_power_up() is just a resume() for devices
* that suspended with irqs off ... no overall powerup.
*/
- device_power_up(in_suspend ?
- (error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
+
Enable_irqs:
local_irq_enable();
+
+ Enable_cpus:
+ enable_nonboot_cpus();
+
+ Platform_finish:
+ platform_finish(platform_mode);
+
+ device_power_up(in_suspend ?
+ (error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
+
+ Unlock:
device_pm_unlock();
+
return error;
}
@@ -257,7 +289,7 @@ static int create_image(int platform_mode)
* hibernation_snapshot - quiesce devices and create the hibernation
* snapshot image.
* @platform_mode - if set, use the platform driver, if available, to
- * prepare the platform frimware for the power transition.
+ * prepare the platform firmware for the power transition.
*
* Must be called with pm_mutex held
*/
@@ -283,25 +315,9 @@ int hibernation_snapshot(int platform_mode)
if (hibernation_test(TEST_DEVICES))
goto Recover_platform;
- error = platform_pre_snapshot(platform_mode);
- if (error || hibernation_test(TEST_PLATFORM))
- goto Finish;
-
- error = disable_nonboot_cpus();
- if (!error) {
- if (hibernation_test(TEST_CPUS))
- goto Enable_cpus;
+ error = create_image(platform_mode);
+ /* Control returns here after successful restore */
- if (hibernation_testmode(HIBERNATION_TEST))
- goto Enable_cpus;
-
- error = create_image(platform_mode);
- /* Control returns here after successful restore */
- }
- Enable_cpus:
- enable_nonboot_cpus();
- Finish:
- platform_finish(platform_mode);
Resume_devices:
device_resume(in_suspend ?
(error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
@@ -323,18 +339,33 @@ int hibernation_snapshot(int platform_mode)
* kernel.
*/
-static int resume_target_kernel(void)
+static int resume_target_kernel(bool platform_mode)
{
int error;
device_pm_lock();
- local_irq_disable();
+
error = device_power_down(PMSG_QUIESCE);
if (error) {
printk(KERN_ERR "PM: Some devices failed to power down, "
"aborting resume\n");
- goto Enable_irqs;
+ goto Unlock;
}
+
+ error = platform_pre_restore(platform_mode);
+ if (error)
+ goto Cleanup;
+
+ error = disable_nonboot_cpus();
+ if (error)
+ goto Enable_cpus;
+
+ local_irq_disable();
+
+ error = sysdev_suspend(PMSG_QUIESCE);
+ if (error)
+ goto Enable_irqs;
+
/* We'll ignore saved state, but this gets preempt count (etc) right */
save_processor_state();
error = restore_highmem();
@@ -357,10 +388,23 @@ static int resume_target_kernel(void)
swsusp_free();
restore_processor_state();
touch_softlockup_watchdog();
- device_power_up(PMSG_RECOVER);
+
+ sysdev_resume();
+
Enable_irqs:
local_irq_enable();
+
+ Enable_cpus:
+ enable_nonboot_cpus();
+
+ Cleanup:
+ platform_restore_cleanup(platform_mode);
+
+ device_power_up(PMSG_RECOVER);
+
+ Unlock:
device_pm_unlock();
+
return error;
}
@@ -368,7 +412,7 @@ static int resume_target_kernel(void)
* hibernation_restore - quiesce devices and restore the hibernation
* snapshot image. If successful, control returns in hibernation_snaphot()
* @platform_mode - if set, use the platform driver, if available, to
- * prepare the platform frimware for the transition.
+ * prepare the platform firmware for the transition.
*
* Must be called with pm_mutex held
*/
@@ -380,19 +424,10 @@ int hibernation_restore(int platform_mode)
pm_prepare_console();
suspend_console();
error = device_suspend(PMSG_QUIESCE);
- if (error)
- goto Finish;
-
- error = platform_pre_restore(platform_mode);
if (!error) {
- error = disable_nonboot_cpus();
- if (!error)
- error = resume_target_kernel();
- enable_nonboot_cpus();
+ error = resume_target_kernel(platform_mode);
+ device_resume(PMSG_RECOVER);
}
- platform_restore_cleanup(platform_mode);
- device_resume(PMSG_RECOVER);
- Finish:
resume_console();
pm_restore_console();
return error;
@@ -428,37 +463,46 @@ int hibernation_platform_enter(void)
goto Resume_devices;
}
+ device_pm_lock();
+
+ error = device_power_down(PMSG_HIBERNATE);
+ if (error)
+ goto Unlock;
+
error = hibernation_ops->prepare();
if (error)
- goto Resume_devices;
+ goto Platofrm_finish;
error = disable_nonboot_cpus();
if (error)
- goto Finish;
+ goto Platofrm_finish;
- device_pm_lock();
local_irq_disable();
- error = device_power_down(PMSG_HIBERNATE);
- if (!error) {
- hibernation_ops->enter();
- /* We should never get here */
- while (1);
- }
- local_irq_enable();
- device_pm_unlock();
+ sysdev_suspend(PMSG_HIBERNATE);
+ hibernation_ops->enter();
+ /* We should never get here */
+ while (1);
/*
* We don't need to reenable the nonboot CPUs or resume consoles, since
* the system is going to be halted anyway.
*/
- Finish:
+ Platofrm_finish:
hibernation_ops->finish();
+
+ device_power_up(PMSG_RESTORE);
+
+ Unlock:
+ device_pm_unlock();
+
Resume_devices:
entering_platform_hibernation = false;
device_resume(PMSG_RESTORE);
resume_console();
+
Close:
hibernation_ops->end();
+
return error;
}
@@ -595,6 +639,12 @@ static int software_resume(void)
unsigned int flags;
/*
+ * If the user said "noresume".. bail out early.
+ */
+ if (noresume)
+ return 0;
+
+ /*
* name_to_dev_t() below takes a sysfs buffer mutex when sysfs
* is configured into the kernel. Since the regular hibernate
* trigger path is via sysfs which takes a buffer mutex before
@@ -610,6 +660,11 @@ static int software_resume(void)
mutex_unlock(&pm_mutex);
return -ENOENT;
}
+ /*
+ * Some device discovery might still be in progress; we need
+ * to wait for this to finish.
+ */
+ wait_for_device_probe();
swsusp_resume_device = name_to_dev_t(resume_file);
pr_debug("PM: Resume from partition %s\n", resume_file);
} else {
diff --git a/kernel/power/main.c b/kernel/power/main.c
index b4d219016b6..f172f41858b 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -287,25 +287,55 @@ void __attribute__ ((weak)) arch_suspend_enable_irqs(void)
*/
static int suspend_enter(suspend_state_t state)
{
- int error = 0;
+ int error;
device_pm_lock();
- arch_suspend_disable_irqs();
- BUG_ON(!irqs_disabled());
- if ((error = device_power_down(PMSG_SUSPEND))) {
+ error = device_power_down(PMSG_SUSPEND);
+ if (error) {
printk(KERN_ERR "PM: Some devices failed to power down\n");
goto Done;
}
- if (!suspend_test(TEST_CORE))
- error = suspend_ops->enter(state);
+ if (suspend_ops->prepare) {
+ error = suspend_ops->prepare();
+ if (error)
+ goto Power_up_devices;
+ }
+
+ if (suspend_test(TEST_PLATFORM))
+ goto Platfrom_finish;
+
+ error = disable_nonboot_cpus();
+ if (error || suspend_test(TEST_CPUS))
+ goto Enable_cpus;
+
+ arch_suspend_disable_irqs();
+ BUG_ON(!irqs_disabled());
+
+ error = sysdev_suspend(PMSG_SUSPEND);
+ if (!error) {
+ if (!suspend_test(TEST_CORE))
+ error = suspend_ops->enter(state);
+ sysdev_resume();
+ }
- device_power_up(PMSG_RESUME);
- Done:
arch_suspend_enable_irqs();
BUG_ON(irqs_disabled());
+
+ Enable_cpus:
+ enable_nonboot_cpus();
+
+ Platfrom_finish:
+ if (suspend_ops->finish)
+ suspend_ops->finish();
+
+ Power_up_devices:
+ device_power_up(PMSG_RESUME);
+
+ Done:
device_pm_unlock();
+
return error;
}
@@ -337,23 +367,8 @@ int suspend_devices_and_enter(suspend_state_t state)
if (suspend_test(TEST_DEVICES))
goto Recover_platform;
- if (suspend_ops->prepare) {
- error = suspend_ops->prepare();
- if (error)
- goto Resume_devices;
- }
-
- if (suspend_test(TEST_PLATFORM))
- goto Finish;
-
- error = disable_nonboot_cpus();
- if (!error && !suspend_test(TEST_CPUS))
- suspend_enter(state);
+ suspend_enter(state);
- enable_nonboot_cpus();
- Finish:
- if (suspend_ops->finish)
- suspend_ops->finish();
Resume_devices:
suspend_test_start();
device_resume(PMSG_RESUME);
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index f5fc2d7680f..33e2e4a819f 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -321,13 +321,10 @@ static int create_mem_extents(struct list_head *list, gfp_t gfp_mask)
INIT_LIST_HEAD(list);
- for_each_zone(zone) {
+ for_each_populated_zone(zone) {
unsigned long zone_start, zone_end;
struct mem_extent *ext, *cur, *aux;
- if (!populated_zone(zone))
- continue;
-
zone_start = zone->zone_start_pfn;
zone_end = zone->zone_start_pfn + zone->spanned_pages;
@@ -804,8 +801,8 @@ static unsigned int count_free_highmem_pages(void)
struct zone *zone;
unsigned int cnt = 0;
- for_each_zone(zone)
- if (populated_zone(zone) && is_highmem(zone))
+ for_each_populated_zone(zone)
+ if (is_highmem(zone))
cnt += zone_page_state(zone, NR_FREE_PAGES);
return cnt;
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 6da14358537..505f319e489 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -60,6 +60,7 @@ static struct block_device *resume_bdev;
static int submit(int rw, pgoff_t page_off, struct page *page,
struct bio **bio_chain)
{
+ const int bio_rw = rw | (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG);
struct bio *bio;
bio = bio_alloc(__GFP_WAIT | __GFP_HIGH, 1);
@@ -80,7 +81,7 @@ static int submit(int rw, pgoff_t page_off, struct page *page,
bio_get(bio);
if (bio_chain == NULL) {
- submit_bio(rw | (1 << BIO_RW_SYNC), bio);
+ submit_bio(bio_rw, bio);
wait_on_page_locked(page);
if (rw == READ)
bio_set_pages_dirty(bio);
@@ -90,7 +91,7 @@ static int submit(int rw, pgoff_t page_off, struct page *page,
get_page(page); /* These pages are freed later */
bio->bi_private = *bio_chain;
*bio_chain = bio;
- submit_bio(rw | (1 << BIO_RW_SYNC), bio);
+ submit_bio(bio_rw, bio);
}
return 0;
}
diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c
index a92c9145155..78c35047586 100644
--- a/kernel/power/swsusp.c
+++ b/kernel/power/swsusp.c
@@ -51,6 +51,7 @@
#include <linux/highmem.h>
#include <linux/time.h>
#include <linux/rbtree.h>
+#include <linux/io.h>
#include "power.h"
@@ -229,17 +230,16 @@ int swsusp_shrink_memory(void)
size = count_data_pages() + PAGES_FOR_IO + SPARE_PAGES;
tmp = size;
size += highmem_size;
- for_each_zone (zone)
- if (populated_zone(zone)) {
- tmp += snapshot_additional_pages(zone);
- if (is_highmem(zone)) {
- highmem_size -=
+ for_each_populated_zone(zone) {
+ tmp += snapshot_additional_pages(zone);
+ if (is_highmem(zone)) {
+ highmem_size -=
zone_page_state(zone, NR_FREE_PAGES);
- } else {
- tmp -= zone_page_state(zone, NR_FREE_PAGES);
- tmp += zone->lowmem_reserve[ZONE_NORMAL];
- }
+ } else {
+ tmp -= zone_page_state(zone, NR_FREE_PAGES);
+ tmp += zone->lowmem_reserve[ZONE_NORMAL];
}
+ }
if (highmem_size < 0)
highmem_size = 0;
diff --git a/kernel/power/user.c b/kernel/power/user.c
index 005b93d839b..6c85359364f 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -95,15 +95,15 @@ static int snapshot_open(struct inode *inode, struct file *filp)
data->swap = swsusp_resume_device ?
swap_type_of(swsusp_resume_device, 0, NULL) : -1;
data->mode = O_RDONLY;
- error = pm_notifier_call_chain(PM_RESTORE_PREPARE);
+ error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE);
if (error)
- pm_notifier_call_chain(PM_POST_RESTORE);
+ pm_notifier_call_chain(PM_POST_HIBERNATION);
} else {
data->swap = -1;
data->mode = O_WRONLY;
- error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE);
+ error = pm_notifier_call_chain(PM_RESTORE_PREPARE);
if (error)
- pm_notifier_call_chain(PM_POST_HIBERNATION);
+ pm_notifier_call_chain(PM_POST_RESTORE);
}
if (error)
atomic_inc(&snapshot_device_available);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-22 22:18:58 +0000