3.19.8-ckt4 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Oliver Hartkopp <socket...@hartkopp.net> 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.schla...@gmx.at> Signed-off-by: Oliver Hartkopp <socket...@hartkopp.net> Signed-off-by: Marc Kleine-Budde <m...@pengutronix.de> Signed-off-by: Kamal Mostafa <ka...@canonical.com> --- drivers/net/can/dev.c | 5 +++++ drivers/net/can/slcan.c | 1 + drivers/net/can/vcan.c | 3 +++ net/can/af_can.c | 6 +++++- 4 files changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c index 62ca0e8..44fc75f 100644 --- a/drivers/net/can/dev.c +++ b/drivers/net/can/dev.c @@ -438,6 +438,9 @@ unsigned int can_get_echo_skb(struct net_device *dev, unsigned int idx) struct can_frame *cf = (struct can_frame *)skb->data; u8 dlc = cf->can_dlc; + if (!(skb->tstamp.tv64)) + __net_timestamp(skb); + netif_rx(priv->echo_skb[idx]); priv->echo_skb[idx] = NULL; @@ -574,6 +577,7 @@ struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf) if (unlikely(!skb)) return NULL; + __net_timestamp(skb); skb->protocol = htons(ETH_P_CAN); skb->pkt_type = PACKET_BROADCAST; skb->ip_summed = CHECKSUM_UNNECESSARY; @@ -602,6 +606,7 @@ struct sk_buff *alloc_canfd_skb(struct net_device *dev, if (unlikely(!skb)) return NULL; + __net_timestamp(skb); skb->protocol = htons(ETH_P_CANFD); skb->pkt_type = PACKET_BROADCAST; skb->ip_summed = CHECKSUM_UNNECESSARY; diff --git a/drivers/net/can/slcan.c b/drivers/net/can/slcan.c index c837eb9..f64f529 100644 --- a/drivers/net/can/slcan.c +++ b/drivers/net/can/slcan.c @@ -207,6 +207,7 @@ static void slc_bump(struct slcan *sl) if (!skb) return; + __net_timestamp(skb); skb->dev = sl->dev; skb->protocol = htons(ETH_P_CAN); skb->pkt_type = PACKET_BROADCAST; diff --git a/drivers/net/can/vcan.c b/drivers/net/can/vcan.c index 674f367..0ce868d 100644 --- a/drivers/net/can/vcan.c +++ b/drivers/net/can/vcan.c @@ -78,6 +78,9 @@ static void vcan_rx(struct sk_buff *skb, struct net_device *dev) skb->dev = dev; skb->ip_summed = CHECKSUM_UNNECESSARY; + if (!(skb->tstamp.tv64)) + __net_timestamp(skb); + netif_rx_ni(skb); } diff --git a/net/can/af_can.c b/net/can/af_can.c index 32d710e..689c818 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++; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
