rtlwifi: Run IPS leave work in a tasklet

This removes the need to use IRQ safe spinlocks in many places.

Signed-off-by: Mike McCormack <mikem@ring3k.org>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rtlwifi/ps.c b/drivers/net/wireless/rtlwifi/ps.c
index a73ffbe..fd3b04f 100644
--- a/drivers/net/wireless/rtlwifi/ps.c
+++ b/drivers/net/wireless/rtlwifi/ps.c
@@ -68,6 +68,7 @@
 
 	/*<2> Disable Interrupt */
 	rtlpriv->cfg->ops->disable_interrupt(hw);
+	tasklet_kill(&rtlpriv->works.irq_tasklet);
 
 	/*<3> Disable Adapter */
 	rtlpriv->cfg->ops->hw_disable(hw);