linux-kernel - [PATCH 148/241] can: bcm: initialize ifindex for timeouts without previous frame reception

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Date:	Thu, 13 Dec 2012 11:58:33 -0200
From:	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Oliver Hartkopp <socketcan@...tkopp.net>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
Subject: [PATCH 148/241] can: bcm: initialize ifindex for timeouts without previous frame reception

3.5.7.2 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Oliver Hartkopp <socketcan@...tkopp.net>

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@...glemail.com>
Signed-off-by: Oliver Hartkopp <socketcan@...tkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
---
 net/can/bcm.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/can/bcm.c b/net/can/bcm.c
index 151b773..3910c1f 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -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;
-- 
1.7.9.5

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