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authorOliver Hartkopp <socketcan@hartkopp.net>2015-06-21 18:50:44 +0200
committerMarc Kleine-Budde <mkl@pengutronix.de>2015-06-21 18:58:58 +0200
commit36c01245eb8046c16eee6431e7dbfbb302635fa8 (patch)
treef53ded9bf6c16fdc6fcb5c9ef9633addf3945fea /net
parent7b48f45797be7c4bdbb772de80efe6bdcd78e81d (diff)
can: fix loss of CAN frames in raw_rcv
As reported by Manfred Schlaegl here http://marc.info/?l=linux-netdev&m=143482089824232&w=2 commit 514ac99c64b "can: fix multiple delivery of a single CAN frame for overlapping CAN filters" requires the skb->tstamp to be set to check for identical CAN skbs. As net timestamping is influenced by several players (netstamp_needed and netdev_tstamp_prequeue) Manfred missed a proper timestamp which leads to CAN frame loss. As skb timestamping became now mandatory for CAN related skbs this patch makes sure that received CAN skbs always have a proper timestamp set. Maybe there's a better solution in the future but this patch fixes the CAN frame loss so far. Reported-by: Manfred Schlaegl <manfred.schlaegl@gmx.at> Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'net')
-rw-r--r--net/can/af_can.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/can/af_can.c b/net/can/af_can.c
index 32d710eaf1fc..689c818ed007 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -310,8 +310,12 @@ int can_send(struct sk_buff *skb, int loop)
return err;
}
- if (newskb)
+ if (newskb) {
+ if (!(newskb->tstamp.tv64))
+ __net_timestamp(newskb);
+
netif_rx_ni(newskb);
+ }
/* update statistics */
can_stats.tx_frames++;