diff options
| author | Vincent Mailhol <mailhol.vincent@wanadoo.fr> | 2021-12-07 15:15:30 +0300 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2022-01-05 14:09:05 +0300 |
| commit | 8e674ca74244eac1cd85c6e9a89b588a03c55ff7 (patch) | |
| tree | 5c7f603ed393781c187c6a2d8ac23e59ca5d7cd1 /drivers/net/can/usb/mcba_usb.c | |
| parent | f68eafeb9759717227cc4cdda9d47c523709c29f (diff) | |
| download | linux-8e674ca74244eac1cd85c6e9a89b588a03c55ff7.tar.xz | |
can: do not increase rx_bytes statistics for RTR frames
The actual payload length of the CAN Remote Transmission Request (RTR)
frames is always 0, i.e. no payload 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.
Link: https://lore.kernel.org/all/20211207121531.42941-5-mailhol.vincent@wanadoo.fr
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Chandrasekar Ramakrishnan <rcsekar@samsung.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: Yasushi SHOJI <yashi@spacecubics.com>
Cc: Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com>
Cc: Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Stephane Grosjean <s.grosjean@peak-system.com>
Tested-by: Jimmy Assarsson <extja@kvaser.com> # kvaser
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Acked-by: Stefan Mätje <stefan.maetje@esd.eu> # esd_usb2
Tested-by: Stefan Mätje <stefan.maetje@esd.eu> # esd_usb2
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can/usb/mcba_usb.c')
| -rw-r--r-- | drivers/net/can/usb/mcba_usb.c | 7 |
1 files changed, 4 insertions, 3 deletions
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); |