Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 1682fe6d authored by Ivo van Doorn's avatar Ivo van Doorn Committed by John W. Linville
Browse files

rt2x00: Add suspend/resume handlers to rt2x00rfkill 



Add suspend/resume handlers to rt2x00rfkill to have it stop
the input-polldev and prevent it from calling rt2x00 during
suspend period. This could lead to a NULL pointer fault when
rt2x00 suspended, but polldev send a request, because
the csr_addr is NULL.

Also don't let the rfkill allocation/registration block
the initialization of the entire device. Just print a warning
and continue as if nothing happened.

Signed-off-by: default avatarIvo van Doorn <IvDoorn@gmail.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent f50e4a84

drivers/net/wireless/rt2x00/rt2x00.h

+3 −0
Original line number Diff line number Diff line
@@ -620,6 +620,9 @@ struct rt2x00_dev { 
	 * This will only be compiled in when required.

	 */

#ifdef CONFIG_RT2X00_LIB_RFKILL

unsigned long rfkill_state;

#define RFKILL_STATE_ALLOCATED		1

#define RFKILL_STATE_REGISTERED		2

	struct rfkill *rfkill;

	struct input_polled_dev *poll_dev;

#endif /* CONFIG_RT2X00_LIB_RFKILL */

drivers/net/wireless/rt2x00/rt2x00dev.c

+14 −21
Original line number Diff line number Diff line
@@ -1098,7 +1098,7 @@ static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev) 
		return;



	/*

	 * Unregister rfkill.

	 * Unregister extra components.

	 */

	rt2x00rfkill_unregister(rt2x00dev);
@@ -1139,11 +1139,9 @@ static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev) 
	__set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);



	/*

	 * Register the rfkill handler.

	 * Register the extra components.

	 */

	status = rt2x00rfkill_register(rt2x00dev);

	if (status)

		goto exit_unitialize;

	rt2x00rfkill_register(rt2x00dev);



	return 0;
@@ -1313,15 +1311,9 @@ int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) 
	}



	/*

	 * Allocatie rfkill.

	 */

	retval = rt2x00rfkill_allocate(rt2x00dev);

	if (retval)

		goto exit;



	/*

	 * Open the debugfs entry.

	 * Register extra components.

	 */

	rt2x00rfkill_allocate(rt2x00dev);

	rt2x00debug_register(rt2x00dev);



	__set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
@@ -1350,13 +1342,9 @@ void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev) 
	rt2x00lib_uninitialize(rt2x00dev);



	/*

	 * Close debugfs entry.

	 * Free extra components

	 */

	rt2x00debug_deregister(rt2x00dev);



	/*

	 * Free rfkill

	 */

	rt2x00rfkill_free(rt2x00dev);



	/*
@@ -1395,11 +1383,15 @@ int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state) 
	__set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);



	/*

	 * Disable radio and unitialize all items

	 * that must be recreated on resume.

	 * Disable radio.

	 */

	rt2x00lib_stop(rt2x00dev);

	rt2x00lib_uninitialize(rt2x00dev);



	/*

	 * Suspend/disable extra components.

	 */

	rt2x00rfkill_suspend(rt2x00dev);

	rt2x00debug_deregister(rt2x00dev);



exit:
@@ -1422,9 +1414,10 @@ int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev) 
	NOTICE(rt2x00dev, "Waking up.\n");



	/*

	 * Open the debugfs entry.

	 * Restore/enable extra components.

	 */

	rt2x00debug_register(rt2x00dev);

	rt2x00rfkill_resume(rt2x00dev);



	/*

	 * Only continue if mac80211 had open interfaces.

drivers/net/wireless/rt2x00/rt2x00lib.h

+14 −6
Original line number Diff line number Diff line
@@ -100,28 +100,36 @@ static inline void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev, 
 * RFkill handlers.

 */

#ifdef CONFIG_RT2X00_LIB_RFKILL

int rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev);

void rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev);

void rt2x00rfkill_unregister(struct rt2x00_dev *rt2x00dev);

int rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev);

void rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev);

void rt2x00rfkill_free(struct rt2x00_dev *rt2x00dev);

void rt2x00rfkill_suspend(struct rt2x00_dev *rt2x00dev);

void rt2x00rfkill_resume(struct rt2x00_dev *rt2x00dev);

#else

static inline int rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev)

static inline void rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev)

{

	return 0;

}



static inline void rt2x00rfkill_unregister(struct rt2x00_dev *rt2x00dev)

{

}



static inline int rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev)

static inline void rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev)

{

	return 0;

}



static inline void rt2x00rfkill_free(struct rt2x00_dev *rt2x00dev)

{

}



static inline void rt2x00rfkill_suspend(struct rt2x00_dev *rt2x00dev)

{

}



static inline void rt2x00rfkill_resume(struct rt2x00_dev *rt2x00dev)

{

}

#endif /* CONFIG_RT2X00_LIB_RFKILL */



#endif /* RT2X00LIB_H */

drivers/net/wireless/rt2x00/rt2x00rfkill.c

+75 −41
Original line number Diff line number Diff line
@@ -69,56 +69,81 @@ static void rt2x00rfkill_poll(struct input_polled_dev *poll_dev) 
	}

}



int rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev)

void rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev)

{

	int retval;



	if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))

		return 0;

	if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags) ||

	    !test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state))

		return;



	retval = rfkill_register(rt2x00dev->rfkill);

	if (retval) {

	if (rfkill_register(rt2x00dev->rfkill)) {

		ERROR(rt2x00dev, "Failed to register rfkill handler.\n");

		return retval;

		return;

	}



	retval = input_register_polled_device(rt2x00dev->poll_dev);

	if (retval) {

	if (input_register_polled_device(rt2x00dev->poll_dev)) {

		ERROR(rt2x00dev, "Failed to register polled device.\n");

		rfkill_unregister(rt2x00dev->rfkill);

		return retval;

		return;

	}



	__set_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state);



	/*

	 * Force initial poll which will detect the initial device state,

	 * and correctly sends the signal to the rfkill layer about this

	 * state.

	 */

	rt2x00rfkill_poll(rt2x00dev->poll_dev);



	return 0;

}



void rt2x00rfkill_unregister(struct rt2x00_dev *rt2x00dev)

{

	if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))

	if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags) ||

	    !test_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state))

		return;



	input_unregister_polled_device(rt2x00dev->poll_dev);

	rfkill_unregister(rt2x00dev->rfkill);



	__clear_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state);

}



int rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev)

static struct input_polled_dev *

rt2x00rfkill_allocate_polldev(struct rt2x00_dev *rt2x00dev)

{

	struct device *device = wiphy_dev(rt2x00dev->hw->wiphy);

	struct input_polled_dev *poll_dev;



	poll_dev = input_allocate_polled_device();

	if (!poll_dev)

		return NULL;



	poll_dev->private = rt2x00dev;

	poll_dev->poll = rt2x00rfkill_poll;

	poll_dev->poll_interval = RFKILL_POLL_INTERVAL;



	poll_dev->input->name = rt2x00dev->ops->name;

	poll_dev->input->phys = wiphy_name(rt2x00dev->hw->wiphy);

	poll_dev->input->id.bustype = BUS_HOST;

	poll_dev->input->id.vendor = 0x1814;

	poll_dev->input->id.product = rt2x00dev->chip.rt;

	poll_dev->input->id.version = rt2x00dev->chip.rev;

	poll_dev->input->dev.parent = wiphy_dev(rt2x00dev->hw->wiphy);

	poll_dev->input->evbit[0] = BIT(EV_KEY);

	set_bit(KEY_WLAN, poll_dev->input->keybit);



	return poll_dev;

}



void rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev)

{

	if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))

		return 0;

		return;



	rt2x00dev->rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);

	rt2x00dev->rfkill =

	    rfkill_allocate(wiphy_dev(rt2x00dev->hw->wiphy), RFKILL_TYPE_WLAN);

	if (!rt2x00dev->rfkill) {

		ERROR(rt2x00dev, "Failed to allocate rfkill handler.\n");

		goto exit;

		return;

	}



	rt2x00dev->rfkill->name = rt2x00dev->ops->name;
@@ -126,40 +151,49 @@ int rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev) 
	rt2x00dev->rfkill->state = -1;

	rt2x00dev->rfkill->toggle_radio = rt2x00rfkill_toggle_radio;



	rt2x00dev->poll_dev = input_allocate_polled_device();

	rt2x00dev->poll_dev = rt2x00rfkill_allocate_polldev(rt2x00dev);

	if (!rt2x00dev->poll_dev) {

		ERROR(rt2x00dev, "Failed to allocate polled device.\n");

		goto exit_free_rfkill;

		rfkill_free(rt2x00dev->rfkill);

		rt2x00dev->rfkill = NULL;

		return;

	}



	rt2x00dev->poll_dev->private = rt2x00dev;

	rt2x00dev->poll_dev->poll = rt2x00rfkill_poll;

	rt2x00dev->poll_dev->poll_interval = RFKILL_POLL_INTERVAL;

	return;

}



	rt2x00dev->poll_dev->input->name = rt2x00dev->ops->name;

	rt2x00dev->poll_dev->input->phys = wiphy_name(rt2x00dev->hw->wiphy);

	rt2x00dev->poll_dev->input->id.bustype = BUS_HOST;

	rt2x00dev->poll_dev->input->id.vendor = 0x1814;

	rt2x00dev->poll_dev->input->id.product = rt2x00dev->chip.rt;

	rt2x00dev->poll_dev->input->id.version = rt2x00dev->chip.rev;

	rt2x00dev->poll_dev->input->dev.parent = device;

	rt2x00dev->poll_dev->input->evbit[0] = BIT(EV_KEY);

	set_bit(KEY_WLAN, rt2x00dev->poll_dev->input->keybit);

void rt2x00rfkill_free(struct rt2x00_dev *rt2x00dev)

{

	if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags) ||

	    !test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state))

		return;



	return 0;

	input_free_polled_device(rt2x00dev->poll_dev);

	rt2x00dev->poll_dev = NULL;



exit_free_rfkill:

	rfkill_free(rt2x00dev->rfkill);



exit:

	return -ENOMEM;

	rt2x00dev->rfkill = NULL;

}



void rt2x00rfkill_free(struct rt2x00_dev *rt2x00dev)

void rt2x00rfkill_suspend(struct rt2x00_dev *rt2x00dev)

{

	if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))

	if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags) ||

	    !test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state))

		return;



	input_free_polled_device(rt2x00dev->poll_dev);

	rfkill_free(rt2x00dev->rfkill);

	rt2x00dev->poll_dev = NULL;

}



void rt2x00rfkill_resume(struct rt2x00_dev *rt2x00dev)

{

	if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags) ||

	    !test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state))

		return;



	rt2x00dev->poll_dev = rt2x00rfkill_allocate_polldev(rt2x00dev);

	if (!rt2x00dev->poll_dev) {

		ERROR(rt2x00dev, "Failed to allocate polled device.\n");

		return;

	}

}