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-rw-r--r--net/rfkill/rfkill-input.c29
-rw-r--r--net/rfkill/rfkill.c75
2 files changed, 76 insertions, 28 deletions
diff --git a/net/rfkill/rfkill-input.c b/net/rfkill/rfkill-input.c
index 5d4c8b2446f7..8aa822730145 100644
--- a/net/rfkill/rfkill-input.c
+++ b/net/rfkill/rfkill-input.c
@@ -84,7 +84,8 @@ static void rfkill_schedule_toggle(struct rfkill_task *task)
spin_lock_irqsave(&task->lock, flags);
if (time_after(jiffies, task->last + msecs_to_jiffies(200))) {
- task->desired_state = !task->desired_state;
+ task->desired_state =
+ rfkill_state_complement(task->desired_state);
task->last = jiffies;
schedule_work(&task->work);
}
@@ -92,14 +93,14 @@ static void rfkill_schedule_toggle(struct rfkill_task *task)
spin_unlock_irqrestore(&task->lock, flags);
}
-#define DEFINE_RFKILL_TASK(n, t) \
- struct rfkill_task n = { \
- .work = __WORK_INITIALIZER(n.work, \
- rfkill_task_handler), \
- .type = t, \
- .mutex = __MUTEX_INITIALIZER(n.mutex), \
- .lock = __SPIN_LOCK_UNLOCKED(n.lock), \
- .desired_state = RFKILL_STATE_ON, \
+#define DEFINE_RFKILL_TASK(n, t) \
+ struct rfkill_task n = { \
+ .work = __WORK_INITIALIZER(n.work, \
+ rfkill_task_handler), \
+ .type = t, \
+ .mutex = __MUTEX_INITIALIZER(n.mutex), \
+ .lock = __SPIN_LOCK_UNLOCKED(n.lock), \
+ .desired_state = RFKILL_STATE_UNBLOCKED, \
}
static DEFINE_RFKILL_TASK(rfkill_wlan, RFKILL_TYPE_WLAN);
@@ -135,15 +136,15 @@ static void rfkill_event(struct input_handle *handle, unsigned int type,
/* handle EPO (emergency power off) through shortcut */
if (data) {
rfkill_schedule_set(&rfkill_wwan,
- RFKILL_STATE_ON);
+ RFKILL_STATE_UNBLOCKED);
rfkill_schedule_set(&rfkill_wimax,
- RFKILL_STATE_ON);
+ RFKILL_STATE_UNBLOCKED);
rfkill_schedule_set(&rfkill_uwb,
- RFKILL_STATE_ON);
+ RFKILL_STATE_UNBLOCKED);
rfkill_schedule_set(&rfkill_bt,
- RFKILL_STATE_ON);
+ RFKILL_STATE_UNBLOCKED);
rfkill_schedule_set(&rfkill_wlan,
- RFKILL_STATE_ON);
+ RFKILL_STATE_UNBLOCKED);
} else
rfkill_schedule_epo();
break;
diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c
index 7d07175c407f..ce0e23148cdd 100644
--- a/net/rfkill/rfkill.c
+++ b/net/rfkill/rfkill.c
@@ -39,7 +39,7 @@ MODULE_LICENSE("GPL");
static LIST_HEAD(rfkill_list); /* list of registered rf switches */
static DEFINE_MUTEX(rfkill_mutex);
-static unsigned int rfkill_default_state = RFKILL_STATE_ON;
+static unsigned int rfkill_default_state = RFKILL_STATE_UNBLOCKED;
module_param_named(default_state, rfkill_default_state, uint, 0444);
MODULE_PARM_DESC(default_state,
"Default initial state for all radio types, 0 = radio off");
@@ -98,7 +98,7 @@ static void rfkill_led_trigger(struct rfkill *rfkill,
if (!led->name)
return;
- if (state == RFKILL_STATE_OFF)
+ if (state != RFKILL_STATE_UNBLOCKED)
led_trigger_event(led, LED_OFF);
else
led_trigger_event(led, LED_FULL);
@@ -128,6 +128,28 @@ static void update_rfkill_state(struct rfkill *rfkill)
}
}
+/**
+ * rfkill_toggle_radio - wrapper for toggle_radio hook
+ * calls toggle_radio taking into account a lot of "small"
+ * details.
+ * @rfkill: the rfkill struct to use
+ * @force: calls toggle_radio even if cache says it is not needed,
+ * and also makes sure notifications of the state will be
+ * sent even if it didn't change
+ * @state: the new state to call toggle_radio() with
+ *
+ * This wrappen protects and enforces the API for toggle_radio
+ * calls. Note that @force cannot override a (possibly cached)
+ * state of RFKILL_STATE_HARD_BLOCKED. Any device making use of
+ * RFKILL_STATE_HARD_BLOCKED implements either get_state() or
+ * rfkill_force_state(), so the cache either is bypassed or valid.
+ *
+ * Note that we do call toggle_radio for RFKILL_STATE_SOFT_BLOCKED
+ * even if the radio is in RFKILL_STATE_HARD_BLOCKED state, so as to
+ * give the driver a hint that it should double-BLOCK the transmitter.
+ *
+ * Caller must have aquired rfkill_mutex.
+ */
static int rfkill_toggle_radio(struct rfkill *rfkill,
enum rfkill_state state,
int force)
@@ -141,9 +163,28 @@ static int rfkill_toggle_radio(struct rfkill *rfkill,
!rfkill->get_state(rfkill->data, &newstate))
rfkill->state = newstate;
+ switch (state) {
+ case RFKILL_STATE_HARD_BLOCKED:
+ /* typically happens when refreshing hardware state,
+ * such as on resume */
+ state = RFKILL_STATE_SOFT_BLOCKED;
+ break;
+ case RFKILL_STATE_UNBLOCKED:
+ /* force can't override this, only rfkill_force_state() can */
+ if (rfkill->state == RFKILL_STATE_HARD_BLOCKED)
+ return -EPERM;
+ break;
+ case RFKILL_STATE_SOFT_BLOCKED:
+ /* nothing to do, we want to give drivers the hint to double
+ * BLOCK even a transmitter that is already in state
+ * RFKILL_STATE_HARD_BLOCKED */
+ break;
+ }
+
if (force || state != rfkill->state) {
retval = rfkill->toggle_radio(rfkill->data, state);
- if (!retval)
+ /* never allow a HARD->SOFT downgrade! */
+ if (!retval && rfkill->state != RFKILL_STATE_HARD_BLOCKED)
rfkill->state = state;
}
@@ -184,7 +225,7 @@ EXPORT_SYMBOL(rfkill_switch_all);
/**
* rfkill_epo - emergency power off all transmitters
*
- * This kicks all rfkill devices to RFKILL_STATE_OFF, ignoring
+ * This kicks all rfkill devices to RFKILL_STATE_SOFT_BLOCKED, ignoring
* everything in its path but rfkill_mutex.
*/
void rfkill_epo(void)
@@ -193,7 +234,7 @@ void rfkill_epo(void)
mutex_lock(&rfkill_mutex);
list_for_each_entry(rfkill, &rfkill_list, node) {
- rfkill_toggle_radio(rfkill, RFKILL_STATE_OFF, 1);
+ rfkill_toggle_radio(rfkill, RFKILL_STATE_SOFT_BLOCKED, 1);
}
mutex_unlock(&rfkill_mutex);
}
@@ -215,8 +256,9 @@ int rfkill_force_state(struct rfkill *rfkill, enum rfkill_state state)
{
enum rfkill_state oldstate;
- if (state != RFKILL_STATE_OFF &&
- state != RFKILL_STATE_ON)
+ if (state != RFKILL_STATE_SOFT_BLOCKED &&
+ state != RFKILL_STATE_UNBLOCKED &&
+ state != RFKILL_STATE_HARD_BLOCKED)
return -EINVAL;
mutex_lock(&rfkill->mutex);
@@ -290,11 +332,14 @@ static ssize_t rfkill_state_store(struct device *dev,
if (!capable(CAP_NET_ADMIN))
return -EPERM;
+ /* RFKILL_STATE_HARD_BLOCKED is illegal here... */
+ if (state != RFKILL_STATE_UNBLOCKED &&
+ state != RFKILL_STATE_SOFT_BLOCKED)
+ return -EINVAL;
+
if (mutex_lock_interruptible(&rfkill->mutex))
return -ERESTARTSYS;
- error = rfkill_toggle_radio(rfkill,
- state ? RFKILL_STATE_ON : RFKILL_STATE_OFF,
- 0);
+ error = rfkill_toggle_radio(rfkill, state, 0);
mutex_unlock(&rfkill->mutex);
return error ? error : count;
@@ -373,7 +418,8 @@ static int rfkill_suspend(struct device *dev, pm_message_t state)
update_rfkill_state(rfkill);
mutex_lock(&rfkill->mutex);
- rfkill->toggle_radio(rfkill->data, RFKILL_STATE_OFF);
+ rfkill->toggle_radio(rfkill->data,
+ RFKILL_STATE_SOFT_BLOCKED);
mutex_unlock(&rfkill->mutex);
}
@@ -470,7 +516,7 @@ static void rfkill_remove_switch(struct rfkill *rfkill)
{
mutex_lock(&rfkill_mutex);
list_del_init(&rfkill->node);
- rfkill_toggle_radio(rfkill, RFKILL_STATE_OFF, 1);
+ rfkill_toggle_radio(rfkill, RFKILL_STATE_SOFT_BLOCKED, 1);
mutex_unlock(&rfkill_mutex);
}
@@ -610,8 +656,9 @@ static int __init rfkill_init(void)
int error;
int i;
- if (rfkill_default_state != RFKILL_STATE_OFF &&
- rfkill_default_state != RFKILL_STATE_ON)
+ /* RFKILL_STATE_HARD_BLOCKED is illegal here... */
+ if (rfkill_default_state != RFKILL_STATE_SOFT_BLOCKED &&
+ rfkill_default_state != RFKILL_STATE_UNBLOCKED)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(rfkill_states); i++)
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-17 15:22:17 +0300