[PATCH] b43legacy: Port b43 rfkill fix to b43legacy

[Stefan Bader]

BugLink: https://bugs.launchpad.net/bugs/476154

"b43: Fix Bugzilla #14181 and the bug from the previous 'fix'" fixed
a crash with the b43 driver, that happens if the radio switch is
turned off.
The same happens when using the b43legacy driver and it was verified,
that the same changes just work in that case too.

CC: stable at kernel.org
Signed-off-by: Stefan Bader <stefan.bader at canonical.com>
---
 drivers/net/wireless/b43legacy/rfkill.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/net/wireless/b43legacy/rfkill.c b/drivers/net/wireless/b43legacy/rfkill.c
index 8783022..ad7083e 100644
--- a/drivers/net/wireless/b43legacy/rfkill.c
+++ b/drivers/net/wireless/b43legacy/rfkill.c
@@ -34,7 +34,8 @@ bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)
 		      & B43legacy_MMIO_RADIO_HWENABLED_HI_MASK))
 			return 1;
 	} else {
-		if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO)
+		if (b43legacy_status(dev) >= B43legacy_STAT_STARTED &&
+		    b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO)
 		    & B43legacy_MMIO_RADIO_HWENABLED_LO_MASK)
 			return 1;
 	}
-- 
1.6.3.3