diff options
| author | Michael Buesch <mb@bu3sch.de> | 2008-07-03 02:04:33 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-07-24 09:14:02 -0700 |
| commit | 204b304df21a73cce2210eae236de6caaf3bc09b (patch) | |
| tree | 042f6f5a2c2b6c43971ae13793a9f84f52fa99b1 | |
| parent | bffce0fa10165b431dec4b727eae2d6e0cf5ddcf (diff) | |
b43: Fix possible MMIO access while device is down
This fixes a possible MMIO access while the device is still down
from a suspend cycle. MMIO accesses with the device powered down
may cause crashes on certain devices.
Upstream commit is
33598cf261e393f2b3349cb55509e358014bfd1f
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/net/wireless/b43/leds.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/wireless/b43/leds.c b/drivers/net/wireless/b43/leds.c index 0aac1ff511d..23d4c095f5e 100644 --- a/drivers/net/wireless/b43/leds.c +++ b/drivers/net/wireless/b43/leds.c @@ -72,6 +72,9 @@ static void b43_led_brightness_set(struct led_classdev *led_dev, struct b43_wldev *dev = led->dev; bool radio_enabled; + if (unlikely(b43_status(dev) < B43_STAT_INITIALIZED)) + return; + /* Checking the radio-enabled status here is slightly racy, * but we want to avoid the locking overhead and we don't care * whether the LED has the wrong state for a second. */ |