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b43: Fix rfkill radio LED

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This fixes Bug #9414

Since addition of the rfkill callback, the LED associated with the off
switch on the radio has not worked for several reasons:

(1) Essential data in the rfkill structure were missing.
(2) The rfkill structure was initialized after the LED initialization.
(3) There was a minor memory leak if the radio LED structure was inited.

Once the above problems were fixed, additional difficulties were noted:

(4) The radio LED was in the wrong state at startup.
(5) The radio switch had to be manipulated twice for each state change.
(6) A circular mutex locking situation existed.
(7) If rfkill-input is built as a module, it is not automatically loaded.

This patch fixes all of the above.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Larry Finger 2007-12-14 13:59:11 +01:00 committed by John W. Linville
parent cb935cb4bd
commit 1a8d122782
3 changed files with 47 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/wireless/b43/leds.c
View File

@ -163,6 +163,9 @@ static void b43_map_led(struct b43_wldev *dev,
b43_register_led(dev, &dev->led_radio, name,
b43_rfkill_led_name(dev),
led_index, activelow);
/* Sync the RF-kill LED state with the switch state. */
if (dev->radio_hw_enable)
b43_led_turn_on(dev, led_index, activelow);
break;
case B43_LED_WEIRD:
case B43_LED_ASSOC:
@ -232,4 +235,5 @@ void b43_leds_exit(struct b43_wldev *dev)
b43_unregister_led(&dev->led_tx);
b43_unregister_led(&dev->led_rx);
b43_unregister_led(&dev->led_assoc);
b43_unregister_led(&dev->led_radio);
}

22
drivers/net/wireless/b43/main.c
View File

@ -2163,7 +2163,6 @@ static void b43_mgmtframe_txantenna(struct b43_wldev *dev, int antenna)
static void b43_chip_exit(struct b43_wldev *dev)
{
b43_radio_turn_off(dev, 1);
b43_leds_exit(dev);
b43_gpio_cleanup(dev);
/* firmware is released later */
}
@ -2191,11 +2190,10 @@ static int b43_chip_init(struct b43_wldev *dev)
err = b43_gpio_init(dev);
if (err)
goto out; /* firmware is released later */
b43_leds_init(dev);
err = b43_upload_initvals(dev);
if (err)
goto err_leds_exit;
goto err_gpio_clean;
b43_radio_turn_on(dev);
b43_write16(dev, 0x03E6, 0x0000);
@ -2271,8 +2269,7 @@ out:
err_radio_off:
b43_radio_turn_off(dev, 1);
err_leds_exit:
b43_leds_exit(dev);
err_gpio_clean:
b43_gpio_cleanup(dev);
return err;
}
@ -3273,10 +3270,7 @@ static void b43_wireless_core_exit(struct b43_wldev *dev)
return;
b43_set_status(dev, B43_STAT_UNINIT);
mutex_unlock(&dev->wl->mutex);
b43_rfkill_exit(dev);
mutex_lock(&dev->wl->mutex);
b43_leds_exit(dev);
b43_rng_exit(dev->wl);
b43_pio_free(dev);
b43_dma_free(dev);
@ -3405,12 +3399,12 @@ static int b43_wireless_core_init(struct b43_wldev *dev)
memset(wl->mac_addr, 0, ETH_ALEN);
b43_upload_card_macaddress(dev);
b43_security_init(dev);
b43_rfkill_init(dev);
b43_rng_init(wl);
b43_set_status(dev, B43_STAT_INITIALIZED);
out:
b43_leds_init(dev);
out:
return err;
err_chip_exit:
@ -3499,6 +3493,10 @@ static int b43_start(struct ieee80211_hw *hw)
int did_init = 0;
int err = 0;
/* First register RFkill.
* LEDs that are registered later depend on it. */
b43_rfkill_init(dev);
mutex_lock(&wl->mutex);
if (b43_status(dev) < B43_STAT_INITIALIZED) {
@ -3528,6 +3526,8 @@ static void b43_stop(struct ieee80211_hw *hw)
struct b43_wl *wl = hw_to_b43_wl(hw);
struct b43_wldev *dev = wl->current_dev;
b43_rfkill_exit(dev);
mutex_lock(&wl->mutex);
if (b43_status(dev) >= B43_STAT_STARTED)
b43_wireless_core_stop(dev);

37
drivers/net/wireless/b43/rfkill.c
View File

@ -25,6 +25,8 @@
#include "rfkill.h"
#include "b43.h"
#include <linux/kmod.h>
/* Returns TRUE, if the radio is enabled in hardware. */
static bool b43_is_hw_radio_enabled(struct b43_wldev *dev)
@ -50,7 +52,10 @@ static void b43_rfkill_poll(struct input_polled_dev *poll_dev)
bool report_change = 0;
mutex_lock(&wl->mutex);
B43_WARN_ON(b43_status(dev) < B43_STAT_INITIALIZED);
if (unlikely(b43_status(dev) < B43_STAT_INITIALIZED)) {
mutex_unlock(&wl->mutex);
return;
}
enabled = b43_is_hw_radio_enabled(dev);
if (unlikely(enabled != dev->radio_hw_enable)) {
dev->radio_hw_enable = enabled;
@ -60,8 +65,12 @@ static void b43_rfkill_poll(struct input_polled_dev *poll_dev)
}
mutex_unlock(&wl->mutex);
if (unlikely(report_change))
input_report_key(poll_dev->input, KEY_WLAN, enabled);
/* send the radio switch event to the system - note both a key press
* and a release are required */
if (unlikely(report_change)) {
input_report_key(poll_dev->input, KEY_WLAN, 1);
input_report_key(poll_dev->input, KEY_WLAN, 0);
}
}
/* Called when the RFKILL toggled in software. */
@ -69,13 +78,15 @@ static int b43_rfkill_soft_toggle(void *data, enum rfkill_state state)
{
struct b43_wldev *dev = data;
struct b43_wl *wl = dev->wl;
int err = 0;
int err = -EBUSY;
if (!wl->rfkill.registered)
return 0;
mutex_lock(&wl->mutex);
B43_WARN_ON(b43_status(dev) < B43_STAT_INITIALIZED);
if (b43_status(dev) < B43_STAT_INITIALIZED)
goto out_unlock;
err = 0;
switch (state) {
case RFKILL_STATE_ON:
if (!dev->radio_hw_enable) {
@ -133,9 +144,25 @@ void b43_rfkill_init(struct b43_wldev *dev)
rfk->poll_dev->poll = b43_rfkill_poll;
rfk->poll_dev->poll_interval = 1000; /* msecs */
rfk->poll_dev->input->name = rfk->name;
rfk->poll_dev->input->id.bustype = BUS_HOST;
rfk->poll_dev->input->id.vendor = dev->dev->bus->boardinfo.vendor;
rfk->poll_dev->input->evbit[0] = BIT(EV_KEY);
set_bit(KEY_WLAN, rfk->poll_dev->input->keybit);
err = rfkill_register(rfk->rfkill);
if (err)
goto err_free_polldev;
#ifdef CONFIG_RFKILL_INPUT_MODULE
/* B43 RF-kill isn't useful without the rfkill-input subsystem.
* Try to load the module. */
err = request_module("rfkill-input");
if (err)
b43warn(wl, "Failed to load the rfkill-input module. "
"The built-in radio LED will not work.\n");
#endif /* CONFIG_RFKILL_INPUT */
err = input_register_polled_device(rfk->poll_dev);
if (err)
goto err_unreg_rfk;