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Date: Fri, 3 Dec 2021 00:35:16 +0100
From: Jimmy Assarsson <extja@...ser.com>
To: Vincent Mailhol <mailhol.vincent@...adoo.fr>,
Marc Kleine-Budde <mkl@...gutronix.de>,
linux-can@...r.kernel.org
Cc: Oliver Hartkopp <socketcan@...tkopp.net>, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-sunxi@...ts.linux.dev,
Nicolas Ferre <nicolas.ferre@...rochip.com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Ludovic Desroches <ludovic.desroches@...rochip.com>,
Chandrasekar Ramakrishnan <rcsekar@...sung.com>,
Maxime Ripard <mripard@...nel.org>,
Chen-Yu Tsai <wens@...e.org>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Yasushi SHOJI <yashi@...cecubics.com>,
Appana Durga Kedareswara rao <appana.durga.rao@...inx.com>,
Naga Sureshkumar Relli <naga.sureshkumar.relli@...inx.com>,
Michal Simek <michal.simek@...inx.com>,
Stephane Grosjean <s.grosjean@...k-system.com>
Subject: Re: [PATCH v3 4/5] can: do not increase rx_bytes statistics for RTR
frames
On 2021-11-28 13:37, Vincent Mailhol wrote:
> 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 use 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.
Hi Vincent!
Thanks for the patch!
I've reviewed and tested the changes affecting kvaser_{pciefd,usb}.
Looks good to me!
Best regards,
jimmy
> 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 | 4 +++-
> drivers/net/can/c_can/c_can_main.c | 4 ++--
> drivers/net/can/cc770/cc770.c | 5 +++--
> drivers/net/can/dev/rx-offload.c | 3 ++-
> drivers/net/can/grcan.c | 6 +++---
> drivers/net/can/ifi_canfd/ifi_canfd.c | 6 +++---
> drivers/net/can/janz-ican3.c | 3 ++-
> drivers/net/can/kvaser_pciefd.c | 11 ++++++-----
> drivers/net/can/m_can/m_can.c | 6 +++---
> drivers/net/can/mscan/mscan.c | 3 ++-
> drivers/net/can/pch_can.c | 6 +++---
> drivers/net/can/peak_canfd/peak_canfd.c | 7 ++++---
> drivers/net/can/rcar/rcar_can.c | 5 +++--
> drivers/net/can/rcar/rcar_canfd.c | 3 ++-
> drivers/net/can/sja1000/sja1000.c | 5 +++--
> drivers/net/can/slcan.c | 4 +++-
> drivers/net/can/spi/hi311x.c | 7 ++++---
> drivers/net/can/spi/mcp251x.c | 5 +++--
> drivers/net/can/sun4i_can.c | 10 ++++++----
> drivers/net/can/usb/ems_usb.c | 5 +++--
> drivers/net/can/usb/esd_usb2.c | 5 +++--
> .../net/can/usb/kvaser_usb/kvaser_usb_hydra.c | 16 ++++++++++------
> drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c | 3 ++-
> drivers/net/can/usb/mcba_usb.c | 7 ++++---
> drivers/net/can/usb/peak_usb/pcan_usb.c | 7 ++++---
> drivers/net/can/usb/peak_usb/pcan_usb_fd.c | 8 ++++----
> drivers/net/can/usb/peak_usb/pcan_usb_pro.c | 10 ++++++----
> drivers/net/can/usb/ucan.c | 3 ++-
> drivers/net/can/usb/usb_8dev.c | 9 +++++----
> drivers/net/can/xilinx_can.c | 10 +++++++---
> 30 files changed, 110 insertions(+), 76 deletions(-)
>
> diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c
> index 3cd872cf9be6..97f1d08b4133 100644
> --- a/drivers/net/can/at91_can.c
> +++ b/drivers/net/can/at91_can.c
> @@ -617,7 +617,9 @@ 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..29e91804d81c 100644
> --- a/drivers/net/can/c_can/c_can_main.c
> +++ b/drivers/net/can/c_can/c_can_main.c
> @@ -403,10 +403,10 @@ static int c_can_read_msg_object(struct net_device *dev, int iface, u32 ctrl)
> frame->data[i + 1] = data >> 8;
> }
> }
> - }
>
> + stats->rx_bytes += frame->len;
> + }
> stats->rx_packets++;
> - 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..994073c0a2f6 100644
> --- a/drivers/net/can/cc770/cc770.c
> +++ b/drivers/net/can/cc770/cc770.c
> @@ -489,10 +489,11 @@ static void cc770_rx(struct net_device *dev, unsigned int mo, u8 ctrl1)
> cf->len = can_cc_dlc2len((config & 0xf0) >> 4);
> for (i = 0; i < cf->len; i++)
> cf->data[i] = cc770_read_reg(priv, msgobj[mo].data[i]);
> - }
>
> + stats->rx_bytes += cf->len;
> + }
> stats->rx_packets++;
> - 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 7dbf46b9ca5d..7f80d8e1e750 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_FLAG)) {
> 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..1b8ef97e4139 100644
> --- a/drivers/net/can/grcan.c
> +++ b/drivers/net/can/grcan.c
> @@ -1211,11 +1211,11 @@ static int grcan_receive(struct net_device *dev, int budget)
> shift = GRCAN_MSG_DATA_SHIFT(i);
> cf->data[i] = (u8)(slot[j] >> shift);
> }
> - }
>
> - /* Update statistics and read pointer */
> + stats->rx_bytes += cf->len;
> + }
> stats->rx_packets++;
> - 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..b0a3473f211d 100644
> --- a/drivers/net/can/ifi_canfd/ifi_canfd.c
> +++ b/drivers/net/can/ifi_canfd/ifi_canfd.c
> @@ -309,15 +309,15 @@ static void ifi_canfd_read_fifo(struct net_device *ndev)
> *(u32 *)(cf->data + i) =
> readl(priv->base + IFI_CANFD_RXFIFO_DATA + i);
> }
> +
> + stats->rx_bytes += cf->len;
> }
> + stats->rx_packets++;
>
> /* Remove the packet from FIFO */
> writel(IFI_CANFD_RXSTCMD_REMOVE_MSG, priv->base + IFI_CANFD_RXSTCMD);
> writel(rx_irq_mask, priv->base + IFI_CANFD_INTERRUPT);
>
> - stats->rx_packets++;
> - 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..6fd6bed04577 100644
> --- a/drivers/net/can/kvaser_pciefd.c
> +++ b/drivers/net/can/kvaser_pciefd.c
> @@ -1182,20 +1182,21 @@ static int kvaser_pciefd_handle_data_packet(struct kvaser_pciefd *pcie,
>
> cf->len = can_fd_dlc2len(p->header[1] >> KVASER_PCIEFD_RPACKET_DLC_SHIFT);
>
> - if (p->header[0] & KVASER_PCIEFD_RPACKET_RTR)
> + if (p->header[0] & KVASER_PCIEFD_RPACKET_RTR) {
> cf->can_id |= CAN_RTR_FLAG;
> - else
> + } else {
> memcpy(cf->data, data, cf->len);
>
> + stats->rx_bytes += cf->len;
> + }
> + stats->rx_packets++;
> +
> shhwtstamps = skb_hwtstamps(skb);
>
> shhwtstamps->hwtstamp =
> ns_to_ktime(div_u64(p->timestamp * 1000,
> pcie->freq_to_ticks_div));
>
> - 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..5dae51212390 100644
> --- a/drivers/net/can/m_can/m_can.c
> +++ b/drivers/net/can/m_can/m_can.c
> @@ -518,14 +518,14 @@ static int m_can_read_fifo(struct net_device *dev, u32 rxfs)
> cf->data, DIV_ROUND_UP(cf->len, 4));
> if (err)
> goto out_free_skb;
> +
> + stats->rx_bytes += cf->len;
> }
> + stats->rx_packets++;
>
> /* acknowledge rx fifo 0 */
> m_can_write(cdev, M_CAN_RXF0A, fgi);
>
> - stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> -
> timestamp = FIELD_GET(RX_BUF_RXTS_MASK, fifo_header.dlc);
>
> m_can_receive_skb(cdev, skb, timestamp);
> 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 4bf9bfc4de72..b46f9cfb9e0a 100644
> --- a/drivers/net/can/pch_can.c
> +++ b/drivers/net/can/pch_can.c
> @@ -688,12 +688,12 @@ static int pch_can_rx_normal(struct net_device *ndev, u32 obj_num, int quota)
> cf->data[i] = data_reg;
> cf->data[i + 1] = data_reg >> 8;
> }
> - }
>
> - rcv_pkts++;
> + stats->rx_bytes += cf->len;
> + }
> stats->rx_packets++;
> + rcv_pkts++;
> quota--;
> - 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..216609198eac 100644
> --- a/drivers/net/can/peak_canfd/peak_canfd.c
> +++ b/drivers/net/can/peak_canfd/peak_canfd.c
> @@ -310,12 +310,13 @@ static int pucan_handle_can_rx(struct peak_canfd_priv *priv,
> if (rx_msg_flags & PUCAN_MSG_EXT_ID)
> cf->can_id |= CAN_EFF_FLAG;
>
> - if (rx_msg_flags & PUCAN_MSG_RTR)
> + if (rx_msg_flags & PUCAN_MSG_RTR) {
> cf->can_id |= CAN_RTR_FLAG;
> - else
> + } else {
> memcpy(cf->data, msg->d, cf->len);
>
> - stats->rx_bytes += cf->len;
> + 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..62bbd58bfef8 100644
> --- a/drivers/net/can/rcar/rcar_can.c
> +++ b/drivers/net/can/rcar/rcar_can.c
> @@ -662,12 +662,13 @@ static void rcar_can_rx_pkt(struct rcar_can_priv *priv)
> for (dlc = 0; dlc < cf->len; dlc++)
> cf->data[dlc] =
> readb(&priv->regs->mb[RCAR_CAN_RX_FIFO_MBX].data[dlc]);
> +
> + stats->rx_bytes += cf->len;
> }
> + stats->rx_packets++;
>
> can_led_event(priv->ndev, CAN_LED_EVENT_RX);
>
> - 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..4bf44d449987 100644
> --- a/drivers/net/can/sja1000/sja1000.c
> +++ b/drivers/net/can/sja1000/sja1000.c
> @@ -372,15 +372,16 @@ static void sja1000_rx(struct net_device *dev)
> } else {
> for (i = 0; i < cf->len; i++)
> cf->data[i] = priv->read_reg(priv, dreg++);
> +
> + stats->rx_bytes += cf->len;
> }
> + stats->rx_packets++;
>
> cf->can_id = id;
>
> /* release receive buffer */
> sja1000_write_cmdreg(priv, CMD_RRB);
>
> - stats->rx_packets++;
> - 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..5cf03458e948 100644
> --- a/drivers/net/can/slcan.c
> +++ b/drivers/net/can/slcan.c
> @@ -218,7 +218,9 @@ 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..771a13945032 100644
> --- a/drivers/net/can/spi/hi311x.c
> +++ b/drivers/net/can/spi/hi311x.c
> @@ -343,14 +343,15 @@ static void hi3110_hw_rx(struct spi_device *spi)
> /* Data length */
> frame->len = can_cc_dlc2len(buf[HI3110_FIFO_WOTIME_DLC_OFF] & 0x0F);
>
> - if (buf[HI3110_FIFO_WOTIME_ID_OFF + 3] & HI3110_FIFO_WOTIME_ID_RTR)
> + if (buf[HI3110_FIFO_WOTIME_ID_OFF + 3] & HI3110_FIFO_WOTIME_ID_RTR) {
> frame->can_id |= CAN_RTR_FLAG;
> - else
> + } else {
> memcpy(frame->data, buf + HI3110_FIFO_WOTIME_DAT_OFF,
> frame->len);
>
> + priv->net->stats.rx_bytes += frame->len;
> + }
> priv->net->stats.rx_packets++;
> - 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 db3fa98569c4..b46516b7d39f 100644
> --- a/drivers/net/can/spi/mcp251x.c
> +++ b/drivers/net/can/spi/mcp251x.c
> @@ -733,11 +733,12 @@ static void mcp251x_hw_rx(struct spi_device *spi, int buf_idx)
> }
> /* Data length */
> frame->len = can_cc_dlc2len(buf[RXBDLC_OFF] & RXBDLC_LEN_MASK);
> - if (!(frame->can_id & CAN_RTR_FLAG))
> + if (!(frame->can_id & CAN_RTR_FLAG)) {
> memcpy(frame->data, buf + RXBDAT_OFF, frame->len);
>
> + priv->net->stats.rx_bytes += frame->len;
> + }
> priv->net->stats.rx_packets++;
> - 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..6a7d89c4648c 100644
> --- a/drivers/net/can/sun4i_can.c
> +++ b/drivers/net/can/sun4i_can.c
> @@ -490,18 +490,20 @@ static void sun4i_can_rx(struct net_device *dev)
> }
>
> /* remote frame ? */
> - if (fi & SUN4I_MSG_RTR_FLAG)
> + if (fi & SUN4I_MSG_RTR_FLAG) {
> id |= CAN_RTR_FLAG;
> - else
> + } else {
> for (i = 0; i < cf->len; i++)
> cf->data[i] = readl(priv->base + dreg + i * 4);
>
> + stats->rx_bytes += cf->len;
> + }
> + stats->rx_packets++;
> +
> cf->can_id = id;
>
> sun4i_can_write_cmdreg(priv, SUN4I_CMD_RELEASE_RBUF);
>
> - stats->rx_packets++;
> - 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..c9b6adf5c1ec 100644
> --- a/drivers/net/can/usb/ems_usb.c
> +++ b/drivers/net/can/usb/ems_usb.c
> @@ -320,10 +320,11 @@ static void ems_usb_rx_can_msg(struct ems_usb *dev, struct ems_cpc_msg *msg)
> } else {
> for (i = 0; i < cf->len; i++)
> cf->data[i] = msg->msg.can_msg.msg[i];
> - }
>
> + stats->rx_bytes += cf->len;
> + }
> stats->rx_packets++;
> - 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..9ac7ee44b6e3 100644
> --- a/drivers/net/can/usb/esd_usb2.c
> +++ b/drivers/net/can/usb/esd_usb2.c
> @@ -332,10 +332,11 @@ static void esd_usb2_rx_can_msg(struct esd_usb2_net_priv *priv,
> } 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);
> }
>
> 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 32fe352dabeb..17fabd3d0613 100644
> --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
> +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
> @@ -1208,13 +1208,15 @@ static void kvaser_usb_hydra_rx_msg_std(const struct kvaser_usb *dev,
>
> cf->len = can_cc_dlc2len(cmd->rx_can.dlc);
>
> - if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME)
> + if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) {
> cf->can_id |= CAN_RTR_FLAG;
> - else
> + } else {
> memcpy(cf->data, cmd->rx_can.data, cf->len);
>
> + stats->rx_bytes += cf->len;
> + }
> stats->rx_packets++;
> - stats->rx_bytes += cf->len;
> +
> netif_rx(skb);
> }
>
> @@ -1286,13 +1288,15 @@ static void kvaser_usb_hydra_rx_msg_ext(const struct kvaser_usb *dev,
> cf->len = can_cc_dlc2len(dlc);
> }
>
> - if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME)
> + if (flags & KVASER_USB_HYDRA_CF_FLAG_REMOTE_FRAME) {
> cf->can_id |= CAN_RTR_FLAG;
> - else
> + } else {
> memcpy(cf->data, cmd->rx_can.kcan_payload, cf->len);
>
> + stats->rx_bytes += cf->len;
> + }
> stats->rx_packets++;
> - 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 162d2e11cadd..4d20ea860ea8 100644
> --- a/drivers/net/can/usb/mcba_usb.c
> +++ b/drivers/net/can/usb/mcba_usb.c
> @@ -452,13 +452,14 @@ static void mcba_usb_process_can(struct mcba_priv *priv,
>
> cf->len = can_cc_dlc2len(msg->dlc & MCBA_DLC_MASK);
>
> - if (msg->dlc & MCBA_DLC_RTR_MASK)
> + if (msg->dlc & MCBA_DLC_RTR_MASK) {
> 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;
>
> 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..d539319232fa 100644
> --- a/drivers/net/can/usb/peak_usb/pcan_usb.c
> +++ b/drivers/net/can/usb/peak_usb/pcan_usb.c
> @@ -676,15 +676,16 @@ static int pcan_usb_decode_data(struct pcan_usb_msg_context *mc, u8 status_len)
> /* Ignore next byte (client private id) if SRR bit is set */
> if (can_id_flags & PCAN_USB_TX_SRR)
> mc->ptr++;
> +
> + /* update statistics */
> + mc->netdev->stats.rx_bytes += cf->len;
> }
> + mc->netdev->stats.rx_packets++;
>
> /* convert timestamp into kernel time */
> hwts = skb_hwtstamps(skb);
> peak_usb_get_ts_time(&mc->pdev->time_ref, mc->ts16, &hwts->hwtstamp);
>
> - /* update statistics */
> - mc->netdev->stats.rx_packets++;
> - 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..ebe087f258e3 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 +536,19 @@ 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..23cdc92fb007 100644
> --- a/drivers/net/can/usb/usb_8dev.c
> +++ b/drivers/net/can/usb/usb_8dev.c
> @@ -474,13 +474,14 @@ 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..ffca1cd3b384 100644
> --- a/drivers/net/can/xilinx_can.c
> +++ b/drivers/net/can/xilinx_can.c
> @@ -787,10 +787,11 @@ 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);
>
> return 1;
> @@ -871,8 +872,11 @@ 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);
>
> return 1;
>
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