can: bcm: initialize ifindex for timeouts without previous frame reception
Oliver Hartkopp [Mon, 26 Nov 2012 21:24:23 +0000 (22:24 +0100)]
commit 81b401100c01d2357031e874689f89bd788d13cd upstream.

Set in the rx_ifindex to pass the correct interface index in the case of a
message timeout detection. Usually the rx_ifindex value is set at receive
time. But when no CAN frame has been received the RX_TIMEOUT notification
did not contain a valid value.

Reported-by: Andre Naujoks <nautsch2@googlemail.com>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

net/can/bcm.c

index 151b773..3910c1f 100644 (file)
@@ -1084,6 +1084,9 @@ static int bcm_rx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
                op->sk = sk;
                op->ifindex = ifindex;
 
+               /* ifindex for timeout events w/o previous frame reception */
+               op->rx_ifindex = ifindex;
+
                /* initialize uninitialized (kzalloc) structure */
                hrtimer_init(&op->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
                op->timer.function = bcm_rx_timeout_handler;