--- a/drivers/net/wireless/p54/p54spi.c
+++ b/drivers/net/wireless/p54/p54spi.c
@@ -656,6 +656,7 @@ static int __devinit p54spi_probe(struct
init_completion(&priv->fw_comp);
INIT_LIST_HEAD(&priv->tx_pending);
mutex_init(&priv->mutex);
+ spin_lock_init(&priv->tx_lock);
SET_IEEE80211_DEV(hw, &spi->dev);
priv->common.open = p54spi_op_start;
priv->common.stop = p54spi_op_stop;