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PM core: rename suspend and resume functions

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This patch (as1241) renames a bunch of functions in the PM core.
Rather than go through a boring list of name changes, suffice it to
say that in the end we have a bunch of pairs of functions:

	device_resume_noirq	dpm_resume_noirq
	device_resume		dpm_resume
	device_complete		dpm_complete
	device_suspend_noirq	dpm_suspend_noirq
	device_suspend		dpm_suspend
	device_prepare		dpm_prepare

in which device_X does the X operation on a single device and dpm_X
invokes device_X for all devices in the dpm_list.

In addition, the old dpm_power_up and device_resume_noirq have been
combined into a single function (dpm_resume_noirq).

Lastly, dpm_suspend_start and dpm_resume_end are the renamed versions
of the former top-level device_suspend and device_resume routines.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Alan Stern 2009-05-24 22:05:42 +02:00 committed by Rafael J. Wysocki
parent e39a71ef80
commit d161630297
7 changed files with 80 additions and 93 deletions
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14
arch/x86/kernel/apm_32.c
View File

@ -1233,9 +1233,9 @@ static int suspend(int vetoable)
int err;
struct apm_user *as;
device_suspend(PMSG_SUSPEND);
dpm_suspend_start(PMSG_SUSPEND);
device_suspend_noirq(PMSG_SUSPEND);
dpm_suspend_noirq(PMSG_SUSPEND);
local_irq_disable();
sysdev_suspend(PMSG_SUSPEND);
@ -1259,9 +1259,9 @@ static int suspend(int vetoable)
sysdev_resume();
local_irq_enable();
device_resume_noirq(PMSG_RESUME);
dpm_resume_noirq(PMSG_RESUME);
device_resume(PMSG_RESUME);
dpm_resume_end(PMSG_RESUME);
queue_event(APM_NORMAL_RESUME, NULL);
spin_lock(&user_list_lock);
for (as = user_list; as != NULL; as = as->next) {
@ -1277,7 +1277,7 @@ static void standby(void)
{
int err;
device_suspend_noirq(PMSG_SUSPEND);
dpm_suspend_noirq(PMSG_SUSPEND);
local_irq_disable();
sysdev_suspend(PMSG_SUSPEND);
@ -1291,7 +1291,7 @@ static void standby(void)
sysdev_resume();
local_irq_enable();
device_resume_noirq(PMSG_RESUME);
dpm_resume_noirq(PMSG_RESUME);
}
static apm_event_t get_event(void)
@ -1376,7 +1376,7 @@ static void check_events(void)
ignore_bounce = 1;
if ((event != APM_NORMAL_RESUME)
|| (ignore_normal_resume == 0)) {
device_resume(PMSG_RESUME);
dpm_resume_end(PMSG_RESUME);
queue_event(event, NULL);
}
ignore_normal_resume = 0;

80
drivers/base/power/main.c
View File

@ -315,13 +315,13 @@ static void pm_dev_err(struct device *dev, pm_message_t state, char *info,
/*------------------------- Resume routines -------------------------*/
/**
* __device_resume_noirq - Power on one device (early resume).
* device_resume_noirq - Power on one device (early resume).
* @dev: Device.
* @state: PM transition of the system being carried out.
*
* Must be called with interrupts disabled.
*/
static int __device_resume_noirq(struct device *dev, pm_message_t state)
static int device_resume_noirq(struct device *dev, pm_message_t state)
{
int error = 0;
@ -344,16 +344,16 @@ static int __device_resume_noirq(struct device *dev, pm_message_t state)
}
/**
* dpm_power_up - Power on all regular (non-sysdev) devices.
* dpm_resume_noirq - Power on all regular (non-sysdev) devices.
* @state: PM transition of the system being carried out.
*
* Execute the appropriate "noirq resume" callback for all devices marked
* as DPM_OFF_IRQ.
* Call the "noirq" resume handlers for all devices marked as
* DPM_OFF_IRQ and enable device drivers to receive interrupts.
*
* Must be called under dpm_list_mtx. Device drivers should not receive
* interrupts while it's being executed.
*/
static void dpm_power_up(pm_message_t state)
void dpm_resume_noirq(pm_message_t state)
{
struct device *dev;
@ -363,33 +363,21 @@ static void dpm_power_up(pm_message_t state)
int error;
dev->power.status = DPM_OFF;
error = __device_resume_noirq(dev, state);
error = device_resume_noirq(dev, state);
if (error)
pm_dev_err(dev, state, " early", error);
}
mutex_unlock(&dpm_list_mtx);
}
/**
* device_resume_noirq - Turn on all devices that need special attention.
* @state: PM transition of the system being carried out.
*
* Call the "early" resume handlers and enable device drivers to receive
* interrupts.
*/
void device_resume_noirq(pm_message_t state)
{
dpm_power_up(state);
resume_device_irqs();
}
EXPORT_SYMBOL_GPL(device_resume_noirq);
EXPORT_SYMBOL_GPL(dpm_resume_noirq);
/**
* resume_device - Restore state for one device.
* device_resume - Restore state for one device.
* @dev: Device.
* @state: PM transition of the system being carried out.
*/
static int resume_device(struct device *dev, pm_message_t state)
static int device_resume(struct device *dev, pm_message_t state)
{
int error = 0;
@ -462,7 +450,7 @@ static void dpm_resume(pm_message_t state)
dev->power.status = DPM_RESUMING;
mutex_unlock(&dpm_list_mtx);
error = resume_device(dev, state);
error = device_resume(dev, state);
mutex_lock(&dpm_list_mtx);
if (error)
@ -480,11 +468,11 @@ static void dpm_resume(pm_message_t state)
}
/**
* complete_device - Complete a PM transition for given device
* device_complete - Complete a PM transition for given device
* @dev: Device.
* @state: PM transition of the system being carried out.
*/
static void complete_device(struct device *dev, pm_message_t state)
static void device_complete(struct device *dev, pm_message_t state)
{
down(&dev->sem);
@ -527,7 +515,7 @@ static void dpm_complete(pm_message_t state)
dev->power.status = DPM_ON;
mutex_unlock(&dpm_list_mtx);
complete_device(dev, state);
device_complete(dev, state);
mutex_lock(&dpm_list_mtx);
}
@ -540,19 +528,19 @@ static void dpm_complete(pm_message_t state)
}
/**
* device_resume - Restore state of each device in system.
* dpm_resume_end - Restore state of each device in system.
* @state: PM transition of the system being carried out.
*
* Resume all the devices, unlock them all, and allow new
* devices to be registered once again.
*/
void device_resume(pm_message_t state)
void dpm_resume_end(pm_message_t state)
{
might_sleep();
dpm_resume(state);
dpm_complete(state);
}
EXPORT_SYMBOL_GPL(device_resume);
EXPORT_SYMBOL_GPL(dpm_resume_end);
/*------------------------- Suspend routines -------------------------*/
@ -577,13 +565,13 @@ static pm_message_t resume_event(pm_message_t sleep_state)
}
/**
* __device_suspend_noirq - Shut down one device (late suspend).
* device_suspend_noirq - Shut down one device (late suspend).
* @dev: Device.
* @state: PM transition of the system being carried out.
*
* This is called with interrupts off and only a single CPU running.
*/
static int __device_suspend_noirq(struct device *dev, pm_message_t state)
static int device_suspend_noirq(struct device *dev, pm_message_t state)
{
int error = 0;
@ -602,15 +590,15 @@ static int __device_suspend_noirq(struct device *dev, pm_message_t state)
}
/**
* device_suspend_noirq - Shut down special devices.
* dpm_suspend_noirq - Power down all regular (non-sysdev) devices.
* @state: PM transition of the system being carried out.
*
* Prevent device drivers from receiving interrupts and call the "late"
* Prevent device drivers from receiving interrupts and call the "noirq"
* suspend handlers.
*
* Must be called under dpm_list_mtx.
*/
int device_suspend_noirq(pm_message_t state)
int dpm_suspend_noirq(pm_message_t state)
{
struct device *dev;
int error = 0;
@ -618,7 +606,7 @@ int device_suspend_noirq(pm_message_t state)
suspend_device_irqs();
mutex_lock(&dpm_list_mtx);
list_for_each_entry_reverse(dev, &dpm_list, power.entry) {
error = __device_suspend_noirq(dev, state);
error = device_suspend_noirq(dev, state);
if (error) {
pm_dev_err(dev, state, " late", error);
break;
@ -627,17 +615,17 @@ int device_suspend_noirq(pm_message_t state)
}
mutex_unlock(&dpm_list_mtx);
if (error)
device_resume_noirq(resume_event(state));
dpm_resume_noirq(resume_event(state));
return error;
}
EXPORT_SYMBOL_GPL(device_suspend_noirq);
EXPORT_SYMBOL_GPL(dpm_suspend_noirq);
/**
* suspend_device - Save state of one device.
* device_suspend - Save state of one device.
* @dev: Device.
* @state: PM transition of the system being carried out.
*/
static int suspend_device(struct device *dev, pm_message_t state)
static int device_suspend(struct device *dev, pm_message_t state)
{
int error = 0;
@ -704,7 +692,7 @@ static int dpm_suspend(pm_message_t state)
get_device(dev);
mutex_unlock(&dpm_list_mtx);
error = suspend_device(dev, state);
error = device_suspend(dev, state);
mutex_lock(&dpm_list_mtx);
if (error) {
@ -723,11 +711,11 @@ static int dpm_suspend(pm_message_t state)
}
/**
* prepare_device - Execute the ->prepare() callback(s) for given device.
* device_prepare - Execute the ->prepare() callback(s) for given device.
* @dev: Device.
* @state: PM transition of the system being carried out.
*/
static int prepare_device(struct device *dev, pm_message_t state)
static int device_prepare(struct device *dev, pm_message_t state)
{
int error = 0;
@ -781,7 +769,7 @@ static int dpm_prepare(pm_message_t state)
dev->power.status = DPM_PREPARING;
mutex_unlock(&dpm_list_mtx);
error = prepare_device(dev, state);
error = device_prepare(dev, state);
mutex_lock(&dpm_list_mtx);
if (error) {
@ -807,12 +795,12 @@ static int dpm_prepare(pm_message_t state)
}
/**
* device_suspend - Save state and stop all devices in system.
* dpm_suspend_start - Save state and stop all devices in system.
* @state: PM transition of the system being carried out.
*
* Prepare and suspend all devices.
*/
int device_suspend(pm_message_t state)
int dpm_suspend_start(pm_message_t state)
{
int error;
@ -822,7 +810,7 @@ int device_suspend(pm_message_t state)
error = dpm_suspend(state);
return error;
}
EXPORT_SYMBOL_GPL(device_suspend);
EXPORT_SYMBOL_GPL(dpm_suspend_start);
void __suspend_report_result(const char *function, void *fn, int ret)
{

16
drivers/xen/manage.c
View File

@ -43,7 +43,7 @@ static int xen_suspend(void *data)
if (err) {
printk(KERN_ERR "xen_suspend: sysdev_suspend failed: %d\n",
err);
device_resume_noirq(PMSG_RESUME);
dpm_resume_noirq(PMSG_RESUME);
return err;
}
@ -69,7 +69,7 @@ static int xen_suspend(void *data)
}
sysdev_resume();
device_resume_noirq(PMSG_RESUME);
dpm_resume_noirq(PMSG_RESUME);
return 0;
}
@ -92,18 +92,18 @@ static void do_suspend(void)
}
#endif
err = device_suspend(PMSG_SUSPEND);
err = dpm_suspend_start(PMSG_SUSPEND);
if (err) {
printk(KERN_ERR "xen suspend: device_suspend %d\n", err);
printk(KERN_ERR "xen suspend: dpm_suspend_start %d\n", err);
goto out;
}
printk(KERN_DEBUG "suspending xenstore...\n");
xs_suspend();
err = device_suspend_noirq(PMSG_SUSPEND);
err = dpm_suspend_noirq(PMSG_SUSPEND);
if (err) {
printk(KERN_ERR "device_suspend_noirq failed: %d\n", err);
printk(KERN_ERR "dpm_suspend_noirq failed: %d\n", err);
goto resume_devices;
}
@ -119,10 +119,10 @@ static void do_suspend(void)
} else
xs_suspend_cancel();
device_resume_noirq(PMSG_RESUME);
dpm_resume_noirq(PMSG_RESUME);
resume_devices:
device_resume(PMSG_RESUME);
dpm_resume_end(PMSG_RESUME);
/* Make sure timer events get retriggered on all CPUs */
clock_was_set();

11
include/linux/pm.h
View File

@ -382,14 +382,13 @@ struct dev_pm_info {
#ifdef CONFIG_PM_SLEEP
extern void device_pm_lock(void);
extern int sysdev_resume(void);
extern void device_resume_noirq(pm_message_t state);
extern void device_resume(pm_message_t state);
extern void dpm_resume_noirq(pm_message_t state);
extern void dpm_resume_end(pm_message_t state);
extern void device_pm_unlock(void);
extern int sysdev_suspend(pm_message_t state);
extern int device_suspend_noirq(pm_message_t state);
extern int device_suspend(pm_message_t state);
extern int device_prepare_suspend(pm_message_t state);
extern int dpm_suspend_noirq(pm_message_t state);
extern int dpm_suspend_start(pm_message_t state);
extern void __suspend_report_result(const char *function, void *fn, int ret);
@ -403,7 +402,7 @@ extern void __suspend_report_result(const char *function, void *fn, int ret);
#define device_pm_lock() do {} while (0)
#define device_pm_unlock() do {} while (0)
static inline int device_suspend(pm_message_t state)
static inline int dpm_suspend_start(pm_message_t state)
{
return 0;
}

14
kernel/kexec.c
View File

@ -1448,17 +1448,17 @@ int kernel_kexec(void)
goto Restore_console;
}
suspend_console();
error = device_suspend(PMSG_FREEZE);
error = dpm_suspend_start(PMSG_FREEZE);
if (error)
goto Resume_console;
/* At this point, device_suspend() has been called,
* but *not* device_suspend_noirq(). We *must* call
* device_suspend_noirq() now. Otherwise, drivers for
/* At this point, dpm_suspend_start() has been called,
* but *not* dpm_suspend_noirq(). We *must* call
* dpm_suspend_noirq() now. Otherwise, drivers for
* some devices (e.g. interrupt controllers) become
* desynchronized with the actual state of the
* hardware at resume time, and evil weirdness ensues.
*/
error = device_suspend_noirq(PMSG_FREEZE);
error = dpm_suspend_noirq(PMSG_FREEZE);
if (error)
goto Resume_devices;
error = disable_nonboot_cpus();
@ -1486,9 +1486,9 @@ int kernel_kexec(void)
local_irq_enable();
Enable_cpus:
enable_nonboot_cpus();
device_resume_noirq(PMSG_RESTORE);
dpm_resume_noirq(PMSG_RESTORE);
Resume_devices:
device_resume(PMSG_RESTORE);
dpm_resume_end(PMSG_RESTORE);
Resume_console:
resume_console();
thaw_processes();

30
kernel/power/disk.c
View File

@ -215,13 +215,13 @@ static int create_image(int platform_mode)
if (error)
return error;
/* At this point, device_suspend() has been called, but *not*
* device_suspend_noirq(). We *must* call device_suspend_noirq() now.
/* At this point, dpm_suspend_start() has been called, but *not*
* dpm_suspend_noirq(). We *must* call dpm_suspend_noirq() now.
* Otherwise, drivers for some devices (e.g. interrupt controllers)
* become desynchronized with the actual state of the hardware
* at resume time, and evil weirdness ensues.
*/
error = device_suspend_noirq(PMSG_FREEZE);
error = dpm_suspend_noirq(PMSG_FREEZE);
if (error) {
printk(KERN_ERR "PM: Some devices failed to power down, "
"aborting hibernation\n");
@ -262,7 +262,7 @@ static int create_image(int platform_mode)
Power_up:
sysdev_resume();
/* NOTE: device_resume_noirq() is just a resume() for devices
/* NOTE: dpm_resume_noirq() is just a resume() for devices
* that suspended with irqs off ... no overall powerup.
*/
@ -275,7 +275,7 @@ static int create_image(int platform_mode)
Platform_finish:
platform_finish(platform_mode);
device_resume_noirq(in_suspend ?
dpm_resume_noirq(in_suspend ?
(error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
return error;
@ -304,7 +304,7 @@ int hibernation_snapshot(int platform_mode)
goto Close;
suspend_console();
error = device_suspend(PMSG_FREEZE);
error = dpm_suspend_start(PMSG_FREEZE);
if (error)
goto Recover_platform;
@ -315,7 +315,7 @@ int hibernation_snapshot(int platform_mode)
/* Control returns here after successful restore */
Resume_devices:
device_resume(in_suspend ?
dpm_resume_end(in_suspend ?
(error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
resume_console();
Close:
@ -339,7 +339,7 @@ static int resume_target_kernel(bool platform_mode)
{
int error;
error = device_suspend_noirq(PMSG_QUIESCE);
error = dpm_suspend_noirq(PMSG_QUIESCE);
if (error) {
printk(KERN_ERR "PM: Some devices failed to power down, "
"aborting resume\n");
@ -394,7 +394,7 @@ static int resume_target_kernel(bool platform_mode)
Cleanup:
platform_restore_cleanup(platform_mode);
device_resume_noirq(PMSG_RECOVER);
dpm_resume_noirq(PMSG_RECOVER);
return error;
}
@ -414,10 +414,10 @@ int hibernation_restore(int platform_mode)
pm_prepare_console();
suspend_console();
error = device_suspend(PMSG_QUIESCE);
error = dpm_suspend_start(PMSG_QUIESCE);
if (!error) {
error = resume_target_kernel(platform_mode);
device_resume(PMSG_RECOVER);
dpm_resume_end(PMSG_RECOVER);
}
resume_console();
pm_restore_console();
@ -447,14 +447,14 @@ int hibernation_platform_enter(void)
entering_platform_hibernation = true;
suspend_console();
error = device_suspend(PMSG_HIBERNATE);
error = dpm_suspend_start(PMSG_HIBERNATE);
if (error) {
if (hibernation_ops->recover)
hibernation_ops->recover();
goto Resume_devices;
}
error = device_suspend_noirq(PMSG_HIBERNATE);
error = dpm_suspend_noirq(PMSG_HIBERNATE);
if (error)
goto Resume_devices;
@ -479,11 +479,11 @@ int hibernation_platform_enter(void)
Platofrm_finish:
hibernation_ops->finish();
device_suspend_noirq(PMSG_RESTORE);
dpm_suspend_noirq(PMSG_RESTORE);
Resume_devices:
entering_platform_hibernation = false;
device_resume(PMSG_RESTORE);
dpm_resume_end(PMSG_RESTORE);
resume_console();
Close:

8
kernel/power/main.c
View File

@ -295,7 +295,7 @@ static int suspend_enter(suspend_state_t state)
return error;
}
error = device_suspend_noirq(PMSG_SUSPEND);
error = dpm_suspend_noirq(PMSG_SUSPEND);
if (error) {
printk(KERN_ERR "PM: Some devices failed to power down\n");
goto Platfrom_finish;
@ -335,7 +335,7 @@ static int suspend_enter(suspend_state_t state)
suspend_ops->wake();
Power_up_devices:
device_resume_noirq(PMSG_RESUME);
dpm_resume_noirq(PMSG_RESUME);
Platfrom_finish:
if (suspend_ops->finish)
@ -363,7 +363,7 @@ int suspend_devices_and_enter(suspend_state_t state)
}
suspend_console();
suspend_test_start();
error = device_suspend(PMSG_SUSPEND);
error = dpm_suspend_start(PMSG_SUSPEND);
if (error) {
printk(KERN_ERR "PM: Some devices failed to suspend\n");
goto Recover_platform;
@ -376,7 +376,7 @@ int suspend_devices_and_enter(suspend_state_t state)
Resume_devices:
suspend_test_start();
device_resume(PMSG_RESUME);
dpm_resume_end(PMSG_RESUME);
suspend_test_finish("resume devices");
resume_console();
Close: