A RX overflow usually happens during high system load. Printing overflow messages to the kernel log, which on embedded systems often is outputted on the serial console, even increases the system load. To decrease the system load in these situations, denote the messages to debug level and wrap them with net_ratelimit(). Link: https://lore.kernel.org/all/20220105154300.1258636-7-mkl@xxxxxxxxxxxxxx Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> --- drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c index a01a3fc3b13c..105426dcf065 100644 --- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c @@ -1652,12 +1652,15 @@ static int mcp251xfd_handle_rxovif(struct mcp251xfd_priv *priv) /* If SERRIF is active, there was a RX MAB overflow. */ if (priv->regs_status.intf & MCP251XFD_REG_INT_SERRIF) { - netdev_info(priv->ndev, - "RX-%d: MAB overflow detected.\n", - ring->nr); + if (net_ratelimit()) + netdev_dbg(priv->ndev, + "RX-%d: MAB overflow detected.\n", + ring->nr); } else { - netdev_info(priv->ndev, - "RX-%d: FIFO overflow.\n", ring->nr); + if (net_ratelimit()) + netdev_dbg(priv->ndev, + "RX-%d: FIFO overflow.\n", + ring->nr); } err = regmap_update_bits(priv->map_reg, -- 2.34.1
