Index: compat-wireless-2011-11-04/drivers/net/wireless/p54/p54spi.c
===================================================================
--- compat-wireless-2011-11-04.orig/drivers/net/wireless/p54/p54spi.c	2011-11-16 22:12:03.648829886 +0100
+++ compat-wireless-2011-11-04/drivers/net/wireless/p54/p54spi.c	2011-11-16 22:15:28.931976935 +0100
@@ -581,11 +581,7 @@ static void p54spi_op_stop(struct ieee80
 	struct p54s_priv *priv = dev->priv;
 	unsigned long flags;
 
-	if (mutex_lock_interruptible(&priv->mutex)) {
-		/* FIXME: how to handle this error? */
-		return;
-	}
-
+	mutex_lock(&priv->mutex);
 	WARN_ON(priv->fw_state != FW_STATE_READY);
 
 	cancel_work_sync(&priv->work);