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can: m_can: m_can_do_rx_poll(): fix extraneous msg loss warning

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[ 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: e0d1f4816f ("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>
This commit is contained in:
Torin Cooper-Bennun 2021-03-03 10:31:52 +00:00 committed by Greg Kroah-Hartman
parent 4fcf59c249
commit afaca48e30
1 changed files with 0 additions and 3 deletions
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3
drivers/net/can/m_can/m_can.c
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@ -502,9 +502,6 @@ static int m_can_do_rx_poll(struct net_device *dev, int quota)
} }
while ((rxfs & RXFS_FFL_MASK) && (quota > 0)) { 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); m_can_read_fifo(dev, rxfs);
quota--; quota--;