Commit 7b3abfc8 authored Jun 15, 2008 by Michael Buesch Committed by John W. Linville Jun 25, 2008

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>

parent 664f2006

drivers/net/wireless/b43/leds.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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. */