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: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2x00rfkill.c b/drivers/net/wireless/rt2x00/rt2x00rfkill.c
index 34a96d4..f955775 100644
--- a/drivers/net/wireless/rt2x00/rt2x00rfkill.c
+++ b/drivers/net/wireless/rt2x00/rt2x00rfkill.c
@@ -69,56 +69,81 @@
}
}
-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) ||
+ !test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state))
+ return;
- if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
- return 0;
-
- 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 @@
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;
-
- 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);
-
- return 0;
-
-exit_free_rfkill:
- rfkill_free(rt2x00dev->rfkill);
-
-exit:
- return -ENOMEM;
+ return;
}
void rt2x00rfkill_free(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);
+ rt2x00dev->poll_dev = NULL;
+
rfkill_free(rt2x00dev->rfkill);
+ rt2x00dev->rfkill = NULL;
+}
+
+void rt2x00rfkill_suspend(struct rt2x00_dev *rt2x00dev)
+{
+ 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);
+ 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;
+ }
}