[ 104/187] can: c_can: precedence error in c_can_chip_config()

Greg Kroah-Hartman
2012-07-12T23:29:39Z

From: Dan Carpenter <dan.carpenter@oracle.com>

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>

---
drivers/net/can/c_can/c_can.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- 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
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);