diff options
| author | Michael Buesch <mb@bu3sch.de> | 2009-09-14 23:22:08 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-09-23 11:35:45 -0400 |
| commit | e899a3f232125c393cdf7f7bf6533501ef8808fb (patch) | |
| tree | bf6dae95b5e9da612ccdc24f56807c66ca310d0a /drivers/net | |
| parent | 9308779aad721cab8434fd5f98d3c85d3716fdec (diff) | |
| download | linux-e899a3f232125c393cdf7f7bf6533501ef8808fb.tar.gz linux-e899a3f232125c393cdf7f7bf6533501ef8808fb.tar.bz2 linux-e899a3f232125c393cdf7f7bf6533501ef8808fb.zip | |
b43: Don't abuse wl->current_dev in the led work
Don't abuse wl->current_dev in the LED work for checking whether we're
going down. Add an explicit variable.
This fixes a crash on rmmod dereferencing the wl->current_dev NULL pointer
in various other places of the driver.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wireless/b43/leds.c | 7 | ||||
| -rw-r--r-- | drivers/net/wireless/b43/leds.h | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/b43/main.c | 2 |
3 files changed, 5 insertions, 5 deletions
diff --git a/drivers/net/wireless/b43/leds.c b/drivers/net/wireless/b43/leds.c index ac5a322c84b7..fbe31e02688b 100644 --- a/drivers/net/wireless/b43/leds.c +++ b/drivers/net/wireless/b43/leds.c @@ -112,10 +112,7 @@ static void b43_led_brightness_set(struct led_classdev *led_dev, struct b43_led *led = container_of(led_dev, struct b43_led, led_dev); struct b43_wl *wl = led->wl; - /* The check for current_dev is only needed while unregistering, - * so it is sequencial and does not race. But we must not dereference - * current_dev here. */ - if (likely(wl->current_dev)) { + if (likely(!wl->leds.stop)) { atomic_set(&led->state, brightness); ieee80211_queue_work(wl->hw, &wl->leds.work); } @@ -314,6 +311,8 @@ void b43_leds_init(struct b43_wldev *dev) break; } } + + dev->wl->leds.stop = 0; } void b43_leds_exit(struct b43_wldev *dev) diff --git a/drivers/net/wireless/b43/leds.h b/drivers/net/wireless/b43/leds.h index c4a58a0fc1d5..49d3da540c28 100644 --- a/drivers/net/wireless/b43/leds.h +++ b/drivers/net/wireless/b43/leds.h @@ -35,6 +35,7 @@ struct b43_leds { struct b43_led led_radio; struct b43_led led_assoc; + bool stop; struct work_struct work; }; diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c index 7fa947ca7c32..a8840ef63770 100644 --- a/drivers/net/wireless/b43/main.c +++ b/drivers/net/wireless/b43/main.c @@ -4987,7 +4987,7 @@ static void b43_remove(struct ssb_device *dev) * might have modified it. Restoring is important, so the networking * stack can properly free resources. */ wl->hw->queues = wl->mac80211_initially_registered_queues; - wl->current_dev = NULL; + wl->leds.stop = 1; cancel_work_sync(&wl->leds.work); ieee80211_unregister_hw(wl->hw); } |