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authorOliver Hartkopp <socketcan@hartkopp.net>2015-06-21 18:50:44 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-07-10 09:49:27 -0700
commit1a2cddd17ebe5e76a796c25e11cdd5518310eabc (patch)
treeb582ac7cd209159054f37f952427cf2264cd5543 /net/can
parentaa0b8c72f5c1e0208bfafb383b535bdc9d3b2c6b (diff)
can: fix loss of CAN frames in raw_rcv
commit 36c01245eb8046c16eee6431e7dbfbb302635fa8 upstream. 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> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/can')
-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++;