Commit f89cbc39 authored by Dmitry Torokhov's avatar Dmitry Torokhov Committed by Greg Kroah-Hartman
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Driver core: add suspend() and resume() to struct device_type 



Driver core: add suspend() and resume() to struct device_type

In cases when there are devices of different types in the same class
we can't use class's implementation of suspend and resume methods and
we need to add them to struct device_type instead.

Also fix error handling in resume code (we should not try to call
class's resume method iof bus's resume method for the device failed.

Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent bf62456e

drivers/base/power/resume.c

+12 −1
Original line number Diff line number Diff line
@@ -26,7 +26,9 @@ int resume_device(struct device * dev) 


	TRACE_DEVICE(dev);

	TRACE_RESUME(0);



	down(&dev->sem);



	if (dev->power.pm_parent

			&& dev->power.pm_parent->power.power_state.event) {

		dev_err(dev, "PM: resume from %d, parent %s still %d\n",
@@ -34,15 +36,24 @@ int resume_device(struct device * dev) 
			dev->power.pm_parent->bus_id,

			dev->power.pm_parent->power.power_state.event);

	}



	if (dev->bus && dev->bus->resume) {

		dev_dbg(dev,"resuming\n");

		error = dev->bus->resume(dev);

	}

	if (dev->class && dev->class->resume) {



	if (!error && dev->type && dev->type->resume) {

		dev_dbg(dev,"resuming\n");

		error = dev->type->resume(dev);

	}



	if (!error && dev->class && dev->class->resume) {

		dev_dbg(dev,"class resume\n");

		error = dev->class->resume(dev);

	}



	up(&dev->sem);



	TRACE_RESUME(error);

	return error;

}

drivers/base/power/suspend.c

+12 −0
Original line number Diff line number Diff line
@@ -78,6 +78,18 @@ int suspend_device(struct device * dev, pm_message_t state) 
		suspend_report_result(dev->class->suspend, error);

	}



	if (!error && dev->type && dev->type->suspend && !dev->power.power_state.event) {

		dev_dbg(dev, "%s%s\n",

			suspend_verb(state.event),

			((state.event == PM_EVENT_SUSPEND)

					&& device_may_wakeup(dev))

				? ", may wakeup"

				: ""

			);

		error = dev->type->suspend(dev, state);

		suspend_report_result(dev->type->suspend, error);

	}



	if (!error && dev->bus && dev->bus->suspend && !dev->power.power_state.event) {

		dev_dbg(dev, "%s%s\n",

			suspend_verb(state.event),

include/linux/device.h

+2 −0
Original line number Diff line number Diff line
@@ -344,6 +344,8 @@ struct device_type { 
	int (*uevent)(struct device *dev, char **envp, int num_envp,

		      char *buffer, int buffer_size);

	void (*release)(struct device *dev);

	int (*suspend)(struct device * dev, pm_message_t state);

	int (*resume)(struct device * dev);

};



/* interface for exporting device attributes */

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