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Commit 022f7b07 authored by Pavel Machek's avatar Pavel Machek Committed by Greg Kroah-Hartman
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[PATCH] Fix Userspace interface breakage in power/state 



Prevent passing invalid values down to the drivers.

Signed-off-by: default avatarPavel Machek <pavel@suse.cz>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 68f5f996

drivers/base/power/sysfs.c

+16 −8
Original line number Diff line number Diff line
@@ -27,22 +27,30 @@ 


static ssize_t state_show(struct device * dev, struct device_attribute *attr, char * buf)

{

	return sprintf(buf, "%u\n", dev->power.power_state.event);

	if (dev->power.power_state.event)

		return sprintf(buf, "2\n");

	else

		return sprintf(buf, "0\n");

}



static ssize_t state_store(struct device * dev, struct device_attribute *attr, const char * buf, size_t n)

{

	pm_message_t state;

	char * rest;

	int error = 0;

	int error = -EINVAL;



	state.event = simple_strtoul(buf, &rest, 10);

	if (*rest)

		return -EINVAL;

	if (state.event)

	state.event = PM_EVENT_SUSPEND;

	/* Older apps expected to write "3" here - confused with PCI D3 */

	if ((n == 1) && !strcmp(buf, "3"))

		error = dpm_runtime_suspend(dev, state);

	else



	if ((n == 1) && !strcmp(buf, "2"))

		error = dpm_runtime_suspend(dev, state);



	if ((n == 1) && !strcmp(buf, "0")) {

		dpm_runtime_resume(dev);

		error = 0;

	}



	return error ? error : n;

}