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Message-ID: <e2d90af1cf41bb9893225289822f93f036d415bb.camel@esd.eu>
Date: Wed, 24 Nov 2021 17:59:14 +0000
From: Stefan Mätje <Stefan.Maetje@....eu>
To: "linux-can@...r.kernel.org" <linux-can@...r.kernel.org>,
"mailhol.vincent@...adoo.fr" <mailhol.vincent@...adoo.fr>,
"mkl@...gutronix.de" <mkl@...gutronix.de>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"alexandre.belloni@...tlin.com" <alexandre.belloni@...tlin.com>,
"appana.durga.rao@...inx.com" <appana.durga.rao@...inx.com>,
"michal.simek@...inx.com" <michal.simek@...inx.com>,
"mripard@...nel.org" <mripard@...nel.org>,
"wens@...e.org" <wens@...e.org>,
"jernej.skrabec@...il.com" <jernej.skrabec@...il.com>,
"yashi@...cecubics.com" <yashi@...cecubics.com>,
"rcsekar@...sung.com" <rcsekar@...sung.com>,
"naga.sureshkumar.relli@...inx.com"
<naga.sureshkumar.relli@...inx.com>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-sunxi@...ts.linux.dev" <linux-sunxi@...ts.linux.dev>,
"s.grosjean@...k-system.com" <s.grosjean@...k-system.com>,
"ludovic.desroches@...rochip.com" <ludovic.desroches@...rochip.com>,
"extja@...ser.com" <extja@...ser.com>,
"nicolas.ferre@...rochip.com" <nicolas.ferre@...rochip.com>
Subject: Re: [PATCH v1 2/2] can: do not increase rx_bytes statistics for RTR
frames
Hi Vincent,
I would like to suggest a slightly different patch for the esd_usb2.c (as
added below).
Best regards,
Stefan Mätje
Am Dienstag, den 23.11.2021, 20:53 +0900 schrieb Vincent Mailhol:
> The actual payload length of the CAN Remote Transmission Request (RTR)
> frames is always 0, i.e. nothing is transmitted on the wire. However,
> those RTR frames still uses the DLC to indicate the length of the
> requested frame.
>
> As such, net_device_stats:rx_bytes should not be increased for the RTR
> frames.
>
> This patch fixes all the CAN drivers.
>
> CC: Jimmy Assarsson <extja@...ser.com>
> CC: Marc Kleine-Budde <mkl@...gutronix.de>
> CC: Nicolas Ferre <nicolas.ferre@...rochip.com>
> CC: Alexandre Belloni <alexandre.belloni@...tlin.com>
> CC: Ludovic Desroches <ludovic.desroches@...rochip.com>
> CC: Chandrasekar Ramakrishnan <rcsekar@...sung.com>
> CC: Maxime Ripard <mripard@...nel.org>
> CC: Chen-Yu Tsai <wens@...e.org>
> CC: Jernej Skrabec <jernej.skrabec@...il.com>
> CC: Yasushi SHOJI <yashi@...cecubics.com>
> CC: Appana Durga Kedareswara rao <appana.durga.rao@...inx.com>
> CC: Naga Sureshkumar Relli <naga.sureshkumar.relli@...inx.com>
> CC: Michal Simek <michal.simek@...inx.com>
> CC: Stephane Grosjean <s.grosjean@...k-system.com>
> Signed-off-by: Vincent Mailhol <mailhol.vincent@...adoo.fr>
> ---
> drivers/net/can/at91_can.c | 3 ++-
> drivers/net/can/c_can/c_can_main.c | 3 ++-
> drivers/net/can/cc770/cc770.c | 3 ++-
> drivers/net/can/dev/rx-offload.c | 3 ++-
> drivers/net/can/grcan.c | 3 ++-
> drivers/net/can/ifi_canfd/ifi_canfd.c | 3 ++-
> drivers/net/can/janz-ican3.c | 3 ++-
> drivers/net/can/kvaser_pciefd.c | 3 ++-
> drivers/net/can/m_can/m_can.c | 3 ++-
> drivers/net/can/mscan/mscan.c | 3 ++-
> drivers/net/can/pch_can.c | 3 ++-
> drivers/net/can/peak_canfd/peak_canfd.c | 3 ++-
> drivers/net/can/rcar/rcar_can.c | 3 ++-
> drivers/net/can/rcar/rcar_canfd.c | 3 ++-
> drivers/net/can/sja1000/sja1000.c | 3 ++-
> drivers/net/can/slcan.c | 3 ++-
> drivers/net/can/spi/hi311x.c | 3 ++-
> drivers/net/can/spi/mcp251x.c | 3 ++-
> drivers/net/can/sun4i_can.c | 3 ++-
> drivers/net/can/usb/ems_usb.c | 3 ++-
> drivers/net/can/usb/esd_usb2.c | 3 ++-
> drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c | 6 ++++--
> drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c | 3 ++-
> drivers/net/can/usb/mcba_usb.c | 3 ++-
> drivers/net/can/usb/peak_usb/pcan_usb.c | 3 ++-
> drivers/net/can/usb/peak_usb/pcan_usb_fd.c | 8 ++++----
> drivers/net/can/usb/peak_usb/pcan_usb_pro.c | 9 +++++----
> drivers/net/can/usb/ucan.c | 3 ++-
> drivers/net/can/usb/usb_8dev.c | 8 ++++----
> drivers/net/can/xilinx_can.c | 8 +++++---
> 30 files changed, 72 insertions(+), 42 deletions(-)
>
> diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c
> index 3cd872cf9be6..89b22c3f9a01 100644
> --- a/drivers/net/can/at91_can.c
> +++ b/drivers/net/can/at91_can.c
> @@ -617,7 +617,8 @@ static void at91_read_msg(struct net_device *dev, unsigned int mb)
> at91_read_mb(dev, mb, cf);
>
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> netif_receive_skb(skb);
>
> can_led_event(dev, CAN_LED_EVENT_RX);
> diff --git a/drivers/net/can/c_can/c_can_main.c b/drivers/net/can/c_can/c_can_main.c
> index 670754a12984..f2eb9ebc875f 100644
> --- a/drivers/net/can/c_can/c_can_main.c
> +++ b/drivers/net/can/c_can/c_can_main.c
> @@ -406,7 +406,8 @@ static int c_can_read_msg_object(struct net_device *dev, int iface, u32 ctrl)
> }
>
> stats->rx_packets++;
> - stats->rx_bytes += frame->len;
> + if (!(frame->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += frame->len;
>
> netif_receive_skb(skb);
> return 0;
> diff --git a/drivers/net/can/cc770/cc770.c b/drivers/net/can/cc770/cc770.c
> index a5fd8ccedec2..7c703bcbb433 100644
> --- a/drivers/net/can/cc770/cc770.c
> +++ b/drivers/net/can/cc770/cc770.c
> @@ -492,7 +492,8 @@ static void cc770_rx(struct net_device *dev, unsigned int mo, u8 ctrl1)
> }
>
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> netif_rx(skb);
> }
>
> diff --git a/drivers/net/can/dev/rx-offload.c b/drivers/net/can/dev/rx-offload.c
> index bb47e9a49240..b10b73e5ed87 100644
> --- a/drivers/net/can/dev/rx-offload.c
> +++ b/drivers/net/can/dev/rx-offload.c
> @@ -56,7 +56,8 @@ static int can_rx_offload_napi_poll(struct napi_struct *napi, int quota)
> work_done++;
> if (!(cf->can_id & CAN_ERR_MASK)) {
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> }
> netif_receive_skb(skb);
> }
> diff --git a/drivers/net/can/grcan.c b/drivers/net/can/grcan.c
> index 78e27940b2af..2f8a08321b41 100644
> --- a/drivers/net/can/grcan.c
> +++ b/drivers/net/can/grcan.c
> @@ -1215,7 +1215,8 @@ static int grcan_receive(struct net_device *dev, int budget)
>
> /* Update statistics and read pointer */
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> netif_receive_skb(skb);
>
> rd = grcan_ring_add(rd, GRCAN_MSG_SIZE, dma->rx.size);
> diff --git a/drivers/net/can/ifi_canfd/ifi_canfd.c b/drivers/net/can/ifi_canfd/ifi_canfd.c
> index e8318e984bf2..1f90c829321e 100644
> --- a/drivers/net/can/ifi_canfd/ifi_canfd.c
> +++ b/drivers/net/can/ifi_canfd/ifi_canfd.c
> @@ -316,7 +316,8 @@ static void ifi_canfd_read_fifo(struct net_device *ndev)
> writel(rx_irq_mask, priv->base + IFI_CANFD_INTERRUPT);
>
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
>
> netif_receive_skb(skb);
> }
> diff --git a/drivers/net/can/janz-ican3.c b/drivers/net/can/janz-ican3.c
> index 32006dbf5abd..5c589aa9dff8 100644
> --- a/drivers/net/can/janz-ican3.c
> +++ b/drivers/net/can/janz-ican3.c
> @@ -1421,7 +1421,8 @@ static int ican3_recv_skb(struct ican3_dev *mod)
>
> /* update statistics, receive the skb */
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> netif_receive_skb(skb);
>
> err_noalloc:
> diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c
> index 483fbd9e6952..88a570476500 100644
> --- a/drivers/net/can/kvaser_pciefd.c
> +++ b/drivers/net/can/kvaser_pciefd.c
> @@ -1193,7 +1193,8 @@ static int kvaser_pciefd_handle_data_packet(struct kvaser_pciefd *pcie,
> ns_to_ktime(div_u64(p->timestamp * 1000,
> pcie->freq_to_ticks_div));
>
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> stats->rx_packets++;
>
> return netif_rx(skb);
> diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
> index c33035e706bc..eedaf66bff31 100644
> --- a/drivers/net/can/m_can/m_can.c
> +++ b/drivers/net/can/m_can/m_can.c
> @@ -524,7 +524,8 @@ static int m_can_read_fifo(struct net_device *dev, u32 rxfs)
> m_can_write(cdev, M_CAN_RXF0A, fgi);
>
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
>
> timestamp = FIELD_GET(RX_BUF_RXTS_MASK, fifo_header.dlc);
>
> diff --git a/drivers/net/can/mscan/mscan.c b/drivers/net/can/mscan/mscan.c
> index 9e1cce0260da..59b8284d00e5 100644
> --- a/drivers/net/can/mscan/mscan.c
> +++ b/drivers/net/can/mscan/mscan.c
> @@ -404,7 +404,8 @@ static int mscan_rx_poll(struct napi_struct *napi, int quota)
> if (canrflg & MSCAN_RXF) {
> mscan_get_rx_frame(dev, frame);
> stats->rx_packets++;
> - stats->rx_bytes += frame->len;
> + if (!(frame->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += frame->len;
> } else if (canrflg & MSCAN_ERR_IF) {
> mscan_get_err_frame(dev, frame, canrflg);
> }
> diff --git a/drivers/net/can/pch_can.c b/drivers/net/can/pch_can.c
> index 6b45840db1f9..8fbe3560216b 100644
> --- a/drivers/net/can/pch_can.c
> +++ b/drivers/net/can/pch_can.c
> @@ -692,7 +692,8 @@ static int pch_can_rx_normal(struct net_device *ndev, u32 obj_num, int quota)
> rcv_pkts++;
> stats->rx_packets++;
> quota--;
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> netif_receive_skb(skb);
>
> pch_fifo_thresh(priv, obj_num);
> diff --git a/drivers/net/can/peak_canfd/peak_canfd.c b/drivers/net/can/peak_canfd/peak_canfd.c
> index d5b8bc6d2980..baae39fa14fc 100644
> --- a/drivers/net/can/peak_canfd/peak_canfd.c
> +++ b/drivers/net/can/peak_canfd/peak_canfd.c
> @@ -315,7 +315,8 @@ static int pucan_handle_can_rx(struct peak_canfd_priv *priv,
> else
> memcpy(cf->data, msg->d, cf->len);
>
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> stats->rx_packets++;
>
> pucan_netif_rx(skb, msg->ts_low, msg->ts_high);
> diff --git a/drivers/net/can/rcar/rcar_can.c b/drivers/net/can/rcar/rcar_can.c
> index f408ed9a6ccd..237a97cd2f78 100644
> --- a/drivers/net/can/rcar/rcar_can.c
> +++ b/drivers/net/can/rcar/rcar_can.c
> @@ -666,7 +666,8 @@ static void rcar_can_rx_pkt(struct rcar_can_priv *priv)
>
> can_led_event(priv->ndev, CAN_LED_EVENT_RX);
>
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> stats->rx_packets++;
> netif_receive_skb(skb);
> }
> diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
> index db9d62874e15..b1eded2f2c5d 100644
> --- a/drivers/net/can/rcar/rcar_canfd.c
> +++ b/drivers/net/can/rcar/rcar_canfd.c
> @@ -1550,7 +1550,8 @@ static void rcar_canfd_rx_pkt(struct rcar_canfd_channel *priv)
>
> can_led_event(priv->ndev, CAN_LED_EVENT_RX);
>
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> stats->rx_packets++;
> netif_receive_skb(skb);
> }
> diff --git a/drivers/net/can/sja1000/sja1000.c b/drivers/net/can/sja1000/sja1000.c
> index a65546ca9461..d2e444968087 100644
> --- a/drivers/net/can/sja1000/sja1000.c
> +++ b/drivers/net/can/sja1000/sja1000.c
> @@ -380,7 +380,8 @@ static void sja1000_rx(struct net_device *dev)
> sja1000_write_cmdreg(priv, CMD_RRB);
>
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> netif_rx(skb);
>
> can_led_event(dev, CAN_LED_EVENT_RX);
> diff --git a/drivers/net/can/slcan.c b/drivers/net/can/slcan.c
> index 9a4ebda30510..c53ad59763e0 100644
> --- a/drivers/net/can/slcan.c
> +++ b/drivers/net/can/slcan.c
> @@ -218,7 +218,8 @@ static void slc_bump(struct slcan *sl)
> skb_put_data(skb, &cf, sizeof(struct can_frame));
>
> sl->dev->stats.rx_packets++;
> - sl->dev->stats.rx_bytes += cf.len;
> + if (!(cf.can_id & CAN_RTR_FLAG))
> + sl->dev->stats.rx_bytes += cf.len;
> netif_rx_ni(skb);
> }
>
> diff --git a/drivers/net/can/spi/hi311x.c b/drivers/net/can/spi/hi311x.c
> index 89d9c986a229..1e2929a9521b 100644
> --- a/drivers/net/can/spi/hi311x.c
> +++ b/drivers/net/can/spi/hi311x.c
> @@ -350,7 +350,8 @@ static void hi3110_hw_rx(struct spi_device *spi)
> frame->len);
>
> priv->net->stats.rx_packets++;
> - priv->net->stats.rx_bytes += frame->len;
> + if (!(frame->can_id & CAN_RTR_FLAG))
> + priv->net->stats.rx_bytes += frame->len;
>
> can_led_event(priv->net, CAN_LED_EVENT_RX);
>
> diff --git a/drivers/net/can/spi/mcp251x.c b/drivers/net/can/spi/mcp251x.c
> index 0579ab74f728..1f47c588b69f 100644
> --- a/drivers/net/can/spi/mcp251x.c
> +++ b/drivers/net/can/spi/mcp251x.c
> @@ -736,7 +736,8 @@ static void mcp251x_hw_rx(struct spi_device *spi, int buf_idx)
> memcpy(frame->data, buf + RXBDAT_OFF, frame->len);
>
> priv->net->stats.rx_packets++;
> - priv->net->stats.rx_bytes += frame->len;
> + if (!(frame->can_id & CAN_RTR_FLAG))
> + priv->net->stats.rx_bytes += frame->len;
>
> can_led_event(priv->net, CAN_LED_EVENT_RX);
>
> diff --git a/drivers/net/can/sun4i_can.c b/drivers/net/can/sun4i_can.c
> index 599174098883..cd3278e5d4f6 100644
> --- a/drivers/net/can/sun4i_can.c
> +++ b/drivers/net/can/sun4i_can.c
> @@ -501,7 +501,8 @@ static void sun4i_can_rx(struct net_device *dev)
> sun4i_can_write_cmdreg(priv, SUN4I_CMD_RELEASE_RBUF);
>
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> netif_rx(skb);
>
> can_led_event(dev, CAN_LED_EVENT_RX);
> diff --git a/drivers/net/can/usb/ems_usb.c b/drivers/net/can/usb/ems_usb.c
> index 7cf65936d02e..f4288f98c006 100644
> --- a/drivers/net/can/usb/ems_usb.c
> +++ b/drivers/net/can/usb/ems_usb.c
> @@ -323,7 +323,8 @@ static void ems_usb_rx_can_msg(struct ems_usb *dev, struct ems_cpc_msg *msg)
> }
>
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> netif_rx(skb);
> }
>
> diff --git a/drivers/net/can/usb/esd_usb2.c b/drivers/net/can/usb/esd_usb2.c
> index 5f6915a27b3d..ac65ddfe814d 100644
> --- a/drivers/net/can/usb/esd_usb2.c
> +++ b/drivers/net/can/usb/esd_usb2.c
> @@ -335,7 +335,8 @@ static void esd_usb2_rx_can_msg(struct esd_usb2_net_priv *priv,
> }
>
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> netif_rx(skb);
> }
>
The version below would save us adding another if() statement to check for RTR or
normal frame that is already tested in the if() statement directly before.
diff --git a/drivers/net/can/usb/esd_usb2.c b/drivers/net/can/usb/esd_usb2.c
index c6068a251fbe..2f91a18fe592 100644
--- a/drivers/net/can/usb/esd_usb2.c
+++ b/drivers/net/can/usb/esd_usb2.c
@@ -332,14 +332,14 @@ static void esd_usb2_rx_can_msg(struct esd_usb2_net_priv *priv,
if (msg->msg.rx.dlc & ESD_RTR) {
cf->can_id |= CAN_RTR_FLAG;
} else {
for (i = 0; i < cf->len; i++)
cf->data[i] = msg->msg.rx.data[i];
+ stats->rx_bytes += cf->len;
}
-
stats->rx_packets++;
- stats->rx_bytes += cf->len;
+
netif_rx(skb);
}
return;
}
>
> diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
> index 3398da323126..adab5c2a8b99 100644
> --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
> +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
> @@ -1206,7 +1206,8 @@ static void kvaser_usb_hydra_rx_msg_std(const struct kvaser_usb *dev,
> memcpy(cf->data, cmd->rx_can.data, cf->len);
>
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> netif_rx(skb);
> }
>
> @@ -1284,7 +1285,8 @@ static void kvaser_usb_hydra_rx_msg_ext(const struct kvaser_usb *dev,
> memcpy(cf->data, cmd->rx_can.kcan_payload, cf->len);
>
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> netif_rx(skb);
> }
>
> diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
> index 4aebaab9ea9c..14b445643554 100644
> --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
> +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
> @@ -1001,7 +1001,8 @@ static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev,
> }
>
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> netif_rx(skb);
> }
>
> diff --git a/drivers/net/can/usb/mcba_usb.c b/drivers/net/can/usb/mcba_usb.c
> index a1a154c08b7f..372f0a5ebb9f 100644
> --- a/drivers/net/can/usb/mcba_usb.c
> +++ b/drivers/net/can/usb/mcba_usb.c
> @@ -458,7 +458,8 @@ static void mcba_usb_process_can(struct mcba_priv *priv,
> memcpy(cf->data, msg->data, cf->len);
>
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
>
> can_led_event(priv->netdev, CAN_LED_EVENT_RX);
> netif_rx(skb);
> diff --git a/drivers/net/can/usb/peak_usb/pcan_usb.c b/drivers/net/can/usb/peak_usb/pcan_usb.c
> index 21b06a738595..d1a4f847f310 100644
> --- a/drivers/net/can/usb/peak_usb/pcan_usb.c
> +++ b/drivers/net/can/usb/peak_usb/pcan_usb.c
> @@ -684,7 +684,8 @@ static int pcan_usb_decode_data(struct pcan_usb_msg_context *mc, u8 status_len)
>
> /* update statistics */
> mc->netdev->stats.rx_packets++;
> - mc->netdev->stats.rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + mc->netdev->stats.rx_bytes += cf->len;
> /* push the skb */
> netif_rx(skb);
>
> diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
> index 185f5a98d217..65487ec33566 100644
> --- a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
> +++ b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
> @@ -507,13 +507,13 @@ static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
> if (rx_msg_flags & PUCAN_MSG_EXT_ID)
> cfd->can_id |= CAN_EFF_FLAG;
>
> - if (rx_msg_flags & PUCAN_MSG_RTR)
> + if (rx_msg_flags & PUCAN_MSG_RTR) {
> cfd->can_id |= CAN_RTR_FLAG;
> - else
> + } else {
> memcpy(cfd->data, rm->d, cfd->len);
> -
> + netdev->stats.rx_bytes += cfd->len;
> + }
> netdev->stats.rx_packets++;
> - netdev->stats.rx_bytes += cfd->len;
>
> peak_usb_netif_rx_64(skb, le32_to_cpu(rm->ts_low),
> le32_to_cpu(rm->ts_high));
> diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
> index f6d19879bf40..69fdddcbba98 100644
> --- a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
> +++ b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
> @@ -536,17 +536,18 @@ static int pcan_usb_pro_handle_canmsg(struct pcan_usb_pro_interface *usb_if,
> if (rx->flags & PCAN_USBPRO_EXT)
> can_frame->can_id |= CAN_EFF_FLAG;
>
> - if (rx->flags & PCAN_USBPRO_RTR)
> + if (rx->flags & PCAN_USBPRO_RTR) {
> can_frame->can_id |= CAN_RTR_FLAG;
> - else
> + } else {
> memcpy(can_frame->data, rx->data, can_frame->len);
> + netdev->stats.rx_bytes += can_frame->len;
> + }
> + netdev->stats.rx_packets++;
>
> hwts = skb_hwtstamps(skb);
> peak_usb_get_ts_time(&usb_if->time_ref, le32_to_cpu(rx->ts32),
> &hwts->hwtstamp);
>
> - netdev->stats.rx_packets++;
> - netdev->stats.rx_bytes += can_frame->len;
> netif_rx(skb);
>
> return 0;
> diff --git a/drivers/net/can/usb/ucan.c b/drivers/net/can/usb/ucan.c
> index d582c39fc8d0..388899019955 100644
> --- a/drivers/net/can/usb/ucan.c
> +++ b/drivers/net/can/usb/ucan.c
> @@ -623,7 +623,8 @@ static void ucan_rx_can_msg(struct ucan_priv *up, struct ucan_message_in *m)
> /* don't count error frames as real packets */
> if (!(cf->can_id & CAN_ERR_FLAG)) {
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> }
>
> /* pass it to Linux */
> diff --git a/drivers/net/can/usb/usb_8dev.c b/drivers/net/can/usb/usb_8dev.c
> index 040324362b26..14ae8ed85f80 100644
> --- a/drivers/net/can/usb/usb_8dev.c
> +++ b/drivers/net/can/usb/usb_8dev.c
> @@ -474,13 +474,13 @@ static void usb_8dev_rx_can_msg(struct usb_8dev_priv *priv,
> if (msg->flags & USB_8DEV_EXTID)
> cf->can_id |= CAN_EFF_FLAG;
>
> - if (msg->flags & USB_8DEV_RTR)
> + if (msg->flags & USB_8DEV_RTR) {
> cf->can_id |= CAN_RTR_FLAG;
> - else
> + } else {
> memcpy(cf->data, msg->data, cf->len);
> -
> + stats->rx_bytes += cf->len;
> + }
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> netif_rx(skb);
>
> can_led_event(priv->netdev, CAN_LED_EVENT_RX);
> diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c
> index 275e240ab293..7d7239ec9920 100644
> --- a/drivers/net/can/xilinx_can.c
> +++ b/drivers/net/can/xilinx_can.c
> @@ -787,9 +787,9 @@ static int xcan_rx(struct net_device *ndev, int frame_base)
> *(__be32 *)(cf->data) = cpu_to_be32(data[0]);
> if (cf->len > 4)
> *(__be32 *)(cf->data + 4) = cpu_to_be32(data[1]);
> - }
>
> - stats->rx_bytes += cf->len;
> + stats->rx_bytes += cf->len;
> + }
> stats->rx_packets++;
> netif_receive_skb(skb);
>
> @@ -871,7 +871,9 @@ static int xcanfd_rx(struct net_device *ndev, int frame_base)
> *(__be32 *)(cf->data + i) = cpu_to_be32(data[0]);
> }
> }
> - stats->rx_bytes += cf->len;
> +
> + if (!(cf->can_id & CAN_RTR_FLAG))
> + stats->rx_bytes += cf->len;
> stats->rx_packets++;
> netif_receive_skb(skb);
>
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