diff options
| author | Michael Buesch <mb@bu3sch.de> | 2008-06-15 16:01:24 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-06-25 10:55:09 -0400 |
| commit | 7b3abfc87ec13a81b255012b6e1bd4caeeb05aec (patch) | |
| tree | d3b4d5e431ed9df28a1d7409658600bfaf26e2ed /drivers/net/wireless/b43/leds.c | |
| parent | 664f200610a3c9641ff58fc91b986b804cb1cc2d (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.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/b43/leds.c')
| -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 36a9c42df83..76f4c7bad8b 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. */ |