diff options
| author | Vincent Mailhol <mailhol.vincent@wanadoo.fr> | 2021-12-07 21:15:30 +0900 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2022-01-05 12:09:05 +0100 |
| commit | 8e674ca74244eac1cd85c6e9a89b588a03c55ff7 (patch) | |
| tree | 5c7f603ed393781c187c6a2d8ac23e59ca5d7cd1 /drivers/net/can/spi | |
| parent | f68eafeb9759717227cc4cdda9d47c523709c29f (diff) | |
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/spi')
| -rw-r--r-- | drivers/net/can/spi/hi311x.c | 7 | ||||
| -rw-r--r-- | drivers/net/can/spi/mcp251x.c | 5 |
2 files changed, 7 insertions, 5 deletions
diff --git a/drivers/net/can/spi/hi311x.c b/drivers/net/can/spi/hi311x.c index a17641d36468..506625082b84 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 2fa1e85fa529..0da965da32cb 100644 --- a/drivers/net/can/spi/mcp251x.c +++ b/drivers/net/can/spi/mcp251x.c @@ -730,11 +730,12 @@ 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); |