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rtl8187: add radio led and fix warnings on suspend

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Michael Buesch reports that his rtl8187 gives warnings on suspend
("queueing ieee80211 work while going to suspend" warnings), as rtl8187
can call ieee80211_queue_delayed_work after mac80211 is suspended.

This change enhances rtl8187 led code so we can avoid queuing work after
mac80211 is suspended: now we register a radio led and make additional
checks to ensure led is off/on properly as mac80211 wants.

Signed-off-by: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Herton Ronaldo Krzesinski 2009-12-09 14:56:13 -02:00 committed by John W. Linville
parent 512414b0be
commit 49d7590ce4
3 changed files with 50 additions and 21 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/net/wireless/rtl818x/rtl8187.h
View file

@ -108,6 +108,7 @@ struct rtl8187_priv {
struct delayed_work work;
struct ieee80211_hw *dev;
#ifdef CONFIG_RTL8187_LEDS
struct rtl8187_led led_radio;
struct rtl8187_led led_tx;
struct rtl8187_led led_rx;
struct delayed_work led_on;

68
drivers/net/wireless/rtl818x/rtl8187_leds.c
View file

@ -105,19 +105,36 @@ static void rtl8187_led_brightness_set(struct led_classdev *led_dev,
struct rtl8187_led *led = container_of(led_dev, struct rtl8187_led,
led_dev);
struct ieee80211_hw *hw = led->dev;
struct rtl8187_priv *priv = hw->priv;
struct rtl8187_priv *priv;
static bool radio_on;
if (brightness == LED_OFF) {
ieee80211_queue_delayed_work(hw, &priv->led_off, 0);
/* The LED is off for 1/20 sec so that it just blinks. */
ieee80211_queue_delayed_work(hw, &priv->led_on, HZ / 20);
} else
ieee80211_queue_delayed_work(hw, &priv->led_on, 0);
if (!hw)
return;
priv = hw->priv;
if (led->is_radio) {
if (brightness == LED_FULL) {
ieee80211_queue_delayed_work(hw, &priv->led_on, 0);
radio_on = true;
} else if (radio_on) {
radio_on = false;
cancel_delayed_work_sync(&priv->led_on);
ieee80211_queue_delayed_work(hw, &priv->led_off, 0);
}
} else if (radio_on) {
if (brightness == LED_OFF) {
ieee80211_queue_delayed_work(hw, &priv->led_off, 0);
/* The LED is off for 1/20 sec - it just blinks. */
ieee80211_queue_delayed_work(hw, &priv->led_on,
HZ / 20);
} else
ieee80211_queue_delayed_work(hw, &priv->led_on, 0);
}
}
static int rtl8187_register_led(struct ieee80211_hw *dev,
struct rtl8187_led *led, const char *name,
const char *default_trigger, u8 ledpin)
const char *default_trigger, u8 ledpin,
bool is_radio)
{
int err;
struct rtl8187_priv *priv = dev->priv;
@ -128,6 +145,7 @@ static int rtl8187_register_led(struct ieee80211_hw *dev,
return -EINVAL;
led->dev = dev;
led->ledpin = ledpin;
led->is_radio = is_radio;
strncpy(led->name, name, sizeof(led->name));
led->led_dev.name = led->name;
@ -145,7 +163,11 @@ static int rtl8187_register_led(struct ieee80211_hw *dev,
static void rtl8187_unregister_led(struct rtl8187_led *led)
{
struct ieee80211_hw *hw = led->dev;
struct rtl8187_priv *priv = hw->priv;
led_classdev_unregister(&led->led_dev);
flush_delayed_work(&priv->led_off);
led->dev = NULL;
}
@ -182,34 +204,38 @@ void rtl8187_leds_init(struct ieee80211_hw *dev, u16 custid)
INIT_DELAYED_WORK(&priv->led_on, led_turn_on);
INIT_DELAYED_WORK(&priv->led_off, led_turn_off);
snprintf(name, sizeof(name),
"rtl8187-%s::radio", wiphy_name(dev->wiphy));
err = rtl8187_register_led(dev, &priv->led_radio, name,
ieee80211_get_radio_led_name(dev), ledpin, true);
if (err)
return;
snprintf(name, sizeof(name),
"rtl8187-%s::tx", wiphy_name(dev->wiphy));
err = rtl8187_register_led(dev, &priv->led_tx, name,
ieee80211_get_tx_led_name(dev), ledpin);
ieee80211_get_tx_led_name(dev), ledpin, false);
if (err)
goto error;
goto err_tx;
snprintf(name, sizeof(name),
"rtl8187-%s::rx", wiphy_name(dev->wiphy));
err = rtl8187_register_led(dev, &priv->led_rx, name,
ieee80211_get_rx_led_name(dev), ledpin);
if (!err) {
ieee80211_queue_delayed_work(dev, &priv->led_on, 0);
ieee80211_get_rx_led_name(dev), ledpin, false);
if (!err)
return;
}
/* registration of RX LED failed - unregister TX */
/* registration of RX LED failed - unregister */
rtl8187_unregister_led(&priv->led_tx);
error:
/* If registration of either failed, cancel delayed work */
cancel_delayed_work_sync(&priv->led_off);
cancel_delayed_work_sync(&priv->led_on);
err_tx:
rtl8187_unregister_led(&priv->led_radio);
}
void rtl8187_leds_exit(struct ieee80211_hw *dev)
{
struct rtl8187_priv *priv = dev->priv;
/* turn the LED off before exiting */
ieee80211_queue_delayed_work(dev, &priv->led_off, 0);
rtl8187_unregister_led(&priv->led_radio);
rtl8187_unregister_led(&priv->led_rx);
rtl8187_unregister_led(&priv->led_tx);
cancel_delayed_work_sync(&priv->led_off);

2
drivers/net/wireless/rtl818x/rtl8187_leds.h
View file

@ -47,6 +47,8 @@ struct rtl8187_led {
u8 ledpin;
/* The unique name string for this LED device. */
char name[RTL8187_LED_MAX_NAME_LEN + 1];
/* If the LED is radio or tx/rx */
bool is_radio;
};
void rtl8187_leds_init(struct ieee80211_hw *dev, u16 code);