Messages in this thread Patch in this message | | | Date | Tue, 22 Jul 2008 16:14:14 -0700 | From | Greg KH <> | Subject | [patch 03/47] b43: Fix possible MMIO access while device is down |
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2.6.25-stable review patch. If anyone has any objections, please let us know.
------------------ From: Michael Buesch <mb@bu3sch.de>
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>
--- drivers/net/wireless/b43/leds.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/net/wireless/b43/leds.c +++ b/drivers/net/wireless/b43/leds.c @@ -72,6 +72,9 @@ static void b43_led_brightness_set(struc 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. */ --
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