can: c_can: precedence error in c_can_chip_config()

commit d9cb9bd63eb27ac19f26a8547128c053f43a5da8 upstream.

(CAN_CTRLMODE_LISTENONLY & CAN_CTRLMODE_LOOPBACK) is (0x02 & 0x01) which
is zero so the condition is never true.  The intent here was to test
that both flags were set.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/can/c_can/c_can.c b/drivers/net/can/c_can/c_can.c
index 8dc84d6..86cd532 100644 (file)
--- a/drivers/net/can/c_can/c_can.c
+++ b/drivers/net/can/c_can/c_can.c
@@ -590,8 +590,8 @@ static void c_can_chip_config(struct net_device *dev)
        priv->write_reg(priv, &priv->regs->control,
                        CONTROL_ENABLE_AR);
 
-       if (priv->can.ctrlmode & (CAN_CTRLMODE_LISTENONLY &
-                                       CAN_CTRLMODE_LOOPBACK)) {
+       if ((priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) &&
+           (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK)) {
                /* loopback + silent mode : useful for hot self-test */
                priv->write_reg(priv, &priv->regs->control, CONTROL_EIE |
                                CONTROL_SIE | CONTROL_IE | CONTROL_TEST);