From e899a3f232125c393cdf7f7bf6533501ef8808fb Mon Sep 17 00:00:00 2001 From: Michael Buesch Date: Mon, 14 Sep 2009 23:22:08 +0200 Subject: 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 Signed-off-by: John W. Linville --- drivers/net/wireless/b43/leds.c | 7 +++---- drivers/net/wireless/b43/leds.h | 1 + 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 ac5a322c84b..fbe31e02688 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 c4a58a0fc1d..49d3da540c2 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 7fa947ca7c3..a8840ef6377 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); } -- cgit v1.2.3