MODULE_LICENSE("GPL");
static LIST_HEAD(rfkill_list); /* list of registered rf switches */
-static DEFINE_MUTEX(rfkill_mutex);
+static DEFINE_MUTEX(rfkill_global_mutex);
static unsigned int rfkill_default_state = RFKILL_STATE_UNBLOCKED;
module_param_named(default_state, rfkill_default_state, uint, 0444);
*/
int register_rfkill_notifier(struct notifier_block *nb)
{
+ BUG_ON(!nb);
return blocking_notifier_chain_register(&rfkill_notifier_list, nb);
}
EXPORT_SYMBOL_GPL(register_rfkill_notifier);
*/
int unregister_rfkill_notifier(struct notifier_block *nb)
{
+ BUG_ON(!nb);
return blocking_notifier_chain_unregister(&rfkill_notifier_list, nb);
}
EXPORT_SYMBOL_GPL(unregister_rfkill_notifier);
static void notify_rfkill_state_change(struct rfkill *rfkill)
{
+ rfkill_led_trigger(rfkill, rfkill->state);
blocking_notifier_call_chain(&rfkill_notifier_list,
RFKILL_STATE_CHANGED,
rfkill);
* RFKILL_STATE_HARD_BLOCKED */
break;
default:
+ WARN(1, KERN_WARNING
+ "rfkill: illegal state %d passed as parameter "
+ "to rfkill_toggle_radio\n", state);
return -EINVAL;
}
rfkill->state = state;
}
- if (force || rfkill->state != oldstate) {
- rfkill_led_trigger(rfkill, rfkill->state);
+ if (force || rfkill->state != oldstate)
notify_rfkill_state_change(rfkill);
- }
return retval;
}
* unless a specific switch is claimed by userspace (in which case,
* that switch is left alone) or suspended.
*
- * Caller must have acquired rfkill_mutex.
+ * Caller must have acquired rfkill_global_mutex.
*/
static void __rfkill_switch_all(const enum rfkill_type type,
const enum rfkill_state state)
{
struct rfkill *rfkill;
- if (unlikely(state >= RFKILL_STATE_MAX))
+ if (WARN((state >= RFKILL_STATE_MAX || type >= RFKILL_TYPE_MAX),
+ KERN_WARNING
+ "rfkill: illegal state %d or type %d "
+ "passed as parameter to __rfkill_switch_all\n",
+ state, type))
return;
rfkill_global_states[type].current_state = state;
* @type: type of interfaces to be affected
* @state: the new state
*
- * Acquires rfkill_mutex and calls __rfkill_switch_all(@type, @state).
+ * Acquires rfkill_global_mutex and calls __rfkill_switch_all(@type, @state).
* Please refer to __rfkill_switch_all() for details.
*/
void rfkill_switch_all(enum rfkill_type type, enum rfkill_state state)
{
- mutex_lock(&rfkill_mutex);
+ mutex_lock(&rfkill_global_mutex);
__rfkill_switch_all(type, state);
- mutex_unlock(&rfkill_mutex);
+ mutex_unlock(&rfkill_global_mutex);
}
EXPORT_SYMBOL(rfkill_switch_all);
* rfkill_epo - emergency power off all transmitters
*
* This kicks all non-suspended rfkill devices to RFKILL_STATE_SOFT_BLOCKED,
- * ignoring everything in its path but rfkill_mutex and rfkill->mutex.
+ * ignoring everything in its path but rfkill_global_mutex and rfkill->mutex.
*
* The global state before the EPO is saved and can be restored later
* using rfkill_restore_states().
struct rfkill *rfkill;
int i;
- mutex_lock(&rfkill_mutex);
+ mutex_lock(&rfkill_global_mutex);
+
list_for_each_entry(rfkill, &rfkill_list, node) {
mutex_lock(&rfkill->mutex);
rfkill_toggle_radio(rfkill, RFKILL_STATE_SOFT_BLOCKED, 1);
rfkill_global_states[i].current_state =
RFKILL_STATE_SOFT_BLOCKED;
}
- mutex_unlock(&rfkill_mutex);
+ mutex_unlock(&rfkill_global_mutex);
}
EXPORT_SYMBOL_GPL(rfkill_epo);
{
int i;
- mutex_lock(&rfkill_mutex);
+ mutex_lock(&rfkill_global_mutex);
+
for (i = 0; i < RFKILL_TYPE_MAX; i++)
__rfkill_switch_all(i, rfkill_global_states[i].default_state);
- mutex_unlock(&rfkill_mutex);
+ mutex_unlock(&rfkill_global_mutex);
}
EXPORT_SYMBOL_GPL(rfkill_restore_states);
{
enum rfkill_state oldstate;
- if (unlikely(state >= RFKILL_STATE_MAX))
+ BUG_ON(!rfkill);
+ if (WARN((state >= RFKILL_STATE_MAX),
+ KERN_WARNING
+ "rfkill: illegal state %d passed as parameter "
+ "to rfkill_force_state\n", state))
return -EINVAL;
mutex_lock(&rfkill->mutex);
const char *buf, size_t count)
{
struct rfkill *rfkill = to_rfkill(dev);
- unsigned int state = simple_strtoul(buf, NULL, 0);
+ unsigned long state;
int error;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
+ error = strict_strtoul(buf, 0, &state);
+ if (error)
+ return error;
+
/* RFKILL_STATE_HARD_BLOCKED is illegal here... */
if (state != RFKILL_STATE_UNBLOCKED &&
state != RFKILL_STATE_SOFT_BLOCKED)
{
struct rfkill *rfkill = to_rfkill(dev);
- return sprintf(buf, "%d", rfkill->user_claim);
+ return sprintf(buf, "%d\n", rfkill->user_claim);
}
static ssize_t rfkill_claim_store(struct device *dev,
const char *buf, size_t count)
{
struct rfkill *rfkill = to_rfkill(dev);
- bool claim = !!simple_strtoul(buf, NULL, 0);
+ unsigned long claim_tmp;
+ bool claim;
int error;
if (!capable(CAP_NET_ADMIN))
if (rfkill->user_claim_unsupported)
return -EOPNOTSUPP;
+ error = strict_strtoul(buf, 0, &claim_tmp);
+ if (error)
+ return error;
+ claim = !!claim_tmp;
+
/*
* Take the global lock to make sure the kernel is not in
* the middle of rfkill_switch_all
*/
- error = mutex_lock_interruptible(&rfkill_mutex);
+ error = mutex_lock_interruptible(&rfkill_global_mutex);
if (error)
return error;
rfkill->user_claim = claim;
}
- mutex_unlock(&rfkill_mutex);
+ mutex_unlock(&rfkill_global_mutex);
return error ? error : count;
}
#ifdef CONFIG_PM
static int rfkill_suspend(struct device *dev, pm_message_t state)
{
- struct rfkill *rfkill = to_rfkill(dev);
-
- if (dev->power.power_state.event != state.event) {
- if (state.event & PM_EVENT_SLEEP) {
- /* Stop transmitter, keep state, no notifies */
- update_rfkill_state(rfkill);
-
- mutex_lock(&rfkill->mutex);
- rfkill->toggle_radio(rfkill->data,
- RFKILL_STATE_SOFT_BLOCKED);
- mutex_unlock(&rfkill->mutex);
- }
-
+ /* mark class device as suspended */
+ if (dev->power.power_state.event != state.event)
dev->power.power_state = state;
- }
return 0;
}
memset(seen, 0, sizeof(seen));
list_for_each_entry(p, &rfkill_list, node) {
- if (p == rfkill) {
- WARN_ON(1);
+ if (WARN((p == rfkill), KERN_WARNING
+ "rfkill: illegal attempt to register "
+ "an already registered rfkill struct\n"))
return -EEXIST;
- }
set_bit(p->type, seen);
}
/* 0: first switch of its kind */
- return test_bit(rfkill->type, seen);
+ return (test_bit(rfkill->type, seen)) ? 1 : 0;
}
static int rfkill_add_switch(struct rfkill *rfkill)
{
int error;
- mutex_lock(&rfkill_mutex);
+ mutex_lock(&rfkill_global_mutex);
error = rfkill_check_duplicity(rfkill);
if (error < 0)
error = 0;
unlock_out:
- mutex_unlock(&rfkill_mutex);
+ mutex_unlock(&rfkill_global_mutex);
return error;
}
static void rfkill_remove_switch(struct rfkill *rfkill)
{
- mutex_lock(&rfkill_mutex);
+ mutex_lock(&rfkill_global_mutex);
list_del_init(&rfkill->node);
- mutex_unlock(&rfkill_mutex);
+ mutex_unlock(&rfkill_global_mutex);
mutex_lock(&rfkill->mutex);
rfkill_toggle_radio(rfkill, RFKILL_STATE_SOFT_BLOCKED, 1);
struct rfkill *rfkill;
struct device *dev;
+ if (WARN((type >= RFKILL_TYPE_MAX),
+ KERN_WARNING
+ "rfkill: illegal type %d passed as parameter "
+ "to rfkill_allocate\n", type))
+ return NULL;
+
rfkill = kzalloc(sizeof(struct rfkill), GFP_KERNEL);
if (!rfkill)
return NULL;
struct device *dev = &rfkill->dev;
int error;
- if (!rfkill->toggle_radio)
- return -EINVAL;
- if (rfkill->type >= RFKILL_TYPE_MAX)
- return -EINVAL;
- if (rfkill->state >= RFKILL_STATE_MAX)
+ if (WARN((!rfkill || !rfkill->toggle_radio ||
+ rfkill->type >= RFKILL_TYPE_MAX ||
+ rfkill->state >= RFKILL_STATE_MAX),
+ KERN_WARNING
+ "rfkill: attempt to register a "
+ "badly initialized rfkill struct\n"))
return -EINVAL;
snprintf(dev->bus_id, sizeof(dev->bus_id),
*/
void rfkill_unregister(struct rfkill *rfkill)
{
+ BUG_ON(!rfkill);
device_del(&rfkill->dev);
rfkill_remove_switch(rfkill);
rfkill_led_trigger_unregister(rfkill);
{
int error;
- if (type >= RFKILL_TYPE_MAX ||
- (state != RFKILL_STATE_SOFT_BLOCKED &&
- state != RFKILL_STATE_UNBLOCKED))
+ if (WARN((type >= RFKILL_TYPE_MAX ||
+ (state != RFKILL_STATE_SOFT_BLOCKED &&
+ state != RFKILL_STATE_UNBLOCKED)),
+ KERN_WARNING
+ "rfkill: illegal state %d or type %d passed as "
+ "parameter to rfkill_set_default\n", state, type))
return -EINVAL;
- mutex_lock(&rfkill_mutex);
+ mutex_lock(&rfkill_global_mutex);
if (!test_and_set_bit(type, rfkill_states_lockdflt)) {
rfkill_global_states[type].default_state = state;
} else
error = -EPERM;
- mutex_unlock(&rfkill_mutex);
+ mutex_unlock(&rfkill_global_mutex);
return error;
}
EXPORT_SYMBOL_GPL(rfkill_set_default);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff