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Diffstat (limited to 'kernel/power/hibernate.c')
-rw-r--r--kernel/power/hibernate.c94
1 files changed, 45 insertions, 49 deletions
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 86385af1080f..a8b978c35a6a 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -10,6 +10,8 @@
* This file is released under the GPLv2.
*/
+#define pr_fmt(fmt) "PM: " fmt
+
#include <linux/export.h>
#include <linux/suspend.h>
#include <linux/syscalls.h>
@@ -21,6 +23,7 @@
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/pm.h>
+#include <linux/nmi.h>
#include <linux/console.h>
#include <linux/cpu.h>
#include <linux/freezer.h>
@@ -104,7 +107,7 @@ EXPORT_SYMBOL(system_entering_hibernation);
#ifdef CONFIG_PM_DEBUG
static void hibernation_debug_sleep(void)
{
- printk(KERN_INFO "hibernation debug: Waiting for 5 seconds.\n");
+ pr_info("hibernation debug: Waiting for 5 seconds.\n");
mdelay(5000);
}
@@ -250,10 +253,9 @@ void swsusp_show_speed(ktime_t start, ktime_t stop,
centisecs = 1; /* avoid div-by-zero */
k = nr_pages * (PAGE_SIZE / 1024);
kps = (k * 100) / centisecs;
- printk(KERN_INFO "PM: %s %u kbytes in %u.%02u seconds (%u.%02u MB/s)\n",
- msg, k,
- centisecs / 100, centisecs % 100,
- kps / 1000, (kps % 1000) / 10);
+ pr_info("%s %u kbytes in %u.%02u seconds (%u.%02u MB/s)\n",
+ msg, k, centisecs / 100, centisecs % 100, kps / 1000,
+ (kps % 1000) / 10);
}
/**
@@ -271,8 +273,7 @@ static int create_image(int platform_mode)
error = dpm_suspend_end(PMSG_FREEZE);
if (error) {
- printk(KERN_ERR "PM: Some devices failed to power down, "
- "aborting hibernation\n");
+ pr_err("Some devices failed to power down, aborting hibernation\n");
return error;
}
@@ -288,8 +289,7 @@ static int create_image(int platform_mode)
error = syscore_suspend();
if (error) {
- printk(KERN_ERR "PM: Some system devices failed to power down, "
- "aborting hibernation\n");
+ pr_err("Some system devices failed to power down, aborting hibernation\n");
goto Enable_irqs;
}
@@ -304,8 +304,8 @@ static int create_image(int platform_mode)
restore_processor_state();
trace_suspend_resume(TPS("machine_suspend"), PM_EVENT_HIBERNATE, false);
if (error)
- printk(KERN_ERR "PM: Error %d creating hibernation image\n",
- error);
+ pr_err("Error %d creating hibernation image\n", error);
+
if (!in_suspend) {
events_check_enabled = false;
clear_free_pages();
@@ -432,8 +432,7 @@ static int resume_target_kernel(bool platform_mode)
error = dpm_suspend_end(PMSG_QUIESCE);
if (error) {
- printk(KERN_ERR "PM: Some devices failed to power down, "
- "aborting resume\n");
+ pr_err("Some devices failed to power down, aborting resume\n");
return error;
}
@@ -608,6 +607,22 @@ static void power_down(void)
{
#ifdef CONFIG_SUSPEND
int error;
+
+ if (hibernation_mode == HIBERNATION_SUSPEND) {
+ error = suspend_devices_and_enter(PM_SUSPEND_MEM);
+ if (error) {
+ hibernation_mode = hibernation_ops ?
+ HIBERNATION_PLATFORM :
+ HIBERNATION_SHUTDOWN;
+ } else {
+ /* Restore swap signature. */
+ error = swsusp_unmark();
+ if (error)
+ pr_err("Swap will be unusable! Try swapon -a.\n");
+
+ return;
+ }
+ }
#endif
switch (hibernation_mode) {
@@ -620,32 +635,13 @@ static void power_down(void)
if (pm_power_off)
kernel_power_off();
break;
-#ifdef CONFIG_SUSPEND
- case HIBERNATION_SUSPEND:
- error = suspend_devices_and_enter(PM_SUSPEND_MEM);
- if (error) {
- if (hibernation_ops)
- hibernation_mode = HIBERNATION_PLATFORM;
- else
- hibernation_mode = HIBERNATION_SHUTDOWN;
- power_down();
- }
- /*
- * Restore swap signature.
- */
- error = swsusp_unmark();
- if (error)
- printk(KERN_ERR "PM: Swap will be unusable! "
- "Try swapon -a.\n");
- return;
-#endif
}
kernel_halt();
/*
* Valid image is on the disk, if we continue we risk serious data
* corruption after resume.
*/
- printk(KERN_CRIT "PM: Please power down manually\n");
+ pr_crit("Power down manually\n");
while (1)
cpu_relax();
}
@@ -655,7 +651,7 @@ static int load_image_and_restore(void)
int error;
unsigned int flags;
- pr_debug("PM: Loading hibernation image.\n");
+ pr_debug("Loading hibernation image.\n");
lock_device_hotplug();
error = create_basic_memory_bitmaps();
@@ -667,7 +663,7 @@ static int load_image_and_restore(void)
if (!error)
hibernation_restore(flags & SF_PLATFORM_MODE);
- printk(KERN_ERR "PM: Failed to load hibernation image, recovering.\n");
+ pr_err("Failed to load hibernation image, recovering.\n");
swsusp_free();
free_basic_memory_bitmaps();
Unlock:
@@ -685,7 +681,7 @@ int hibernate(void)
bool snapshot_test = false;
if (!hibernation_available()) {
- pr_debug("PM: Hibernation not available.\n");
+ pr_debug("Hibernation not available.\n");
return -EPERM;
}
@@ -703,9 +699,9 @@ int hibernate(void)
goto Exit;
}
- printk(KERN_INFO "PM: Syncing filesystems ... ");
+ pr_info("Syncing filesystems ... \n");
sys_sync();
- printk("done.\n");
+ pr_info("done.\n");
error = freeze_processes();
if (error)
@@ -731,7 +727,7 @@ int hibernate(void)
else
flags |= SF_CRC32_MODE;
- pr_debug("PM: writing image.\n");
+ pr_debug("Writing image.\n");
error = swsusp_write(flags);
swsusp_free();
if (!error) {
@@ -743,7 +739,7 @@ int hibernate(void)
in_suspend = 0;
pm_restore_gfp_mask();
} else {
- pr_debug("PM: Image restored successfully.\n");
+ pr_debug("Image restored successfully.\n");
}
Free_bitmaps:
@@ -751,7 +747,7 @@ int hibernate(void)
Thaw:
unlock_device_hotplug();
if (snapshot_test) {
- pr_debug("PM: Checking hibernation image\n");
+ pr_debug("Checking hibernation image\n");
error = swsusp_check();
if (!error)
error = load_image_and_restore();
@@ -815,10 +811,10 @@ static int software_resume(void)
goto Unlock;
}
- pr_debug("PM: Checking hibernation image partition %s\n", resume_file);
+ pr_debug("Checking hibernation image partition %s\n", resume_file);
if (resume_delay) {
- printk(KERN_INFO "Waiting %dsec before reading resume device...\n",
+ pr_info("Waiting %dsec before reading resume device ...\n",
resume_delay);
ssleep(resume_delay);
}
@@ -857,10 +853,10 @@ static int software_resume(void)
}
Check_image:
- pr_debug("PM: Hibernation image partition %d:%d present\n",
+ pr_debug("Hibernation image partition %d:%d present\n",
MAJOR(swsusp_resume_device), MINOR(swsusp_resume_device));
- pr_debug("PM: Looking for hibernation image.\n");
+ pr_debug("Looking for hibernation image.\n");
error = swsusp_check();
if (error)
goto Unlock;
@@ -879,7 +875,7 @@ static int software_resume(void)
goto Close_Finish;
}
- pr_debug("PM: Preparing processes for restore.\n");
+ pr_debug("Preparing processes for restore.\n");
error = freeze_processes();
if (error)
goto Close_Finish;
@@ -892,7 +888,7 @@ static int software_resume(void)
/* For success case, the suspend path will release the lock */
Unlock:
mutex_unlock(&pm_mutex);
- pr_debug("PM: Hibernation image not present or could not be loaded.\n");
+ pr_debug("Hibernation image not present or could not be loaded.\n");
return error;
Close_Finish:
swsusp_close(FMODE_READ);
@@ -1016,7 +1012,7 @@ static ssize_t disk_store(struct kobject *kobj, struct kobj_attribute *attr,
error = -EINVAL;
if (!error)
- pr_debug("PM: Hibernation mode set to '%s'\n",
+ pr_debug("Hibernation mode set to '%s'\n",
hibernation_modes[mode]);
unlock_system_sleep();
return error ? error : n;
@@ -1052,7 +1048,7 @@ static ssize_t resume_store(struct kobject *kobj, struct kobj_attribute *attr,
lock_system_sleep();
swsusp_resume_device = res;
unlock_system_sleep();
- printk(KERN_INFO "PM: Starting manual resume from disk\n");
+ pr_info("Starting manual resume from disk\n");
noresume = 0;
software_resume();
return n;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 05:01:28 +0000