staging: brcm80211: bugfix for stack dump on firmware load problems

If there is a problem with the firmware load (eg, firmware not present in
/lib/firmware/brcm), then the driver would dump its stack instead of bailing
out gracefully. Root cause was an uninitialized variable (wl->pub) being
dereferenced in the rfkill portion of a cleanup routine (wl_remove). Fix was
to move the rfkill calls into the correct spot in wl_remove().
Signed-off-by: NRoland Vossen <rvossen@broadcom.com>
Reviewed-by: NArend van Spriel <arend@broadcom.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/brcm80211/brcmsmac/wl_mac80211.c

@@ -1206,15 +1206,13 @@ static void wl_remove(struct pci_dev *pdev)
 		return;
 	}
 
-	/* make sure rfkill is not using driver */
-	wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, false);
-	wiphy_rfkill_stop_polling(wl->pub->ieee_hw->wiphy);
-
 	if (!wlc_chipmatch(pdev->vendor, pdev->device)) {
 		WL_ERROR("wl: wl_remove: wlc_chipmatch failed\n");
 		return;
 	}
 	if (wl->wlc) {
+		wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, false);
+		wiphy_rfkill_stop_polling(wl->pub->ieee_hw->wiphy);
 		ieee80211_unregister_hw(hw);
 		WL_LOCK(wl);
 		wl_down(wl);