From: Torin Cooper-Bennun torin@maxiluxsystems.com
[ Upstream commit c0e399f3baf42279f48991554240af8c457535d1 ]
Message loss from RX FIFO 0 is already handled in m_can_handle_lost_msg(), with netdev output included.
Removing this warning also improves driver performance under heavy load, where m_can_do_rx_poll() may be called many times before this interrupt is cleared, causing this message to be output many times (thanks Mariusz Madej for this report).
Fixes: e0d1f4816f2a ("can: m_can: add Bosch M_CAN controller support") Link: https://lore.kernel.org/r/20210303103151.3760532-1-torin@maxiluxsystems.com Reported-by: Mariusz Madej mariusz.madej@xtrack.com Signed-off-by: Torin Cooper-Bennun torin@maxiluxsystems.com Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/can/m_can/m_can.c | 3 --- 1 file changed, 3 deletions(-)
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 8a842545e3f6..cf72a7e464ec 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -501,9 +501,6 @@ static int m_can_do_rx_poll(struct net_device *dev, int quota) }
while ((rxfs & RXFS_FFL_MASK) && (quota > 0)) { - if (rxfs & RXFS_RFL) - netdev_warn(dev, "Rx FIFO 0 Message Lost\n"); - m_can_read_fifo(dev, rxfs);
quota--;