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| author | Torin Cooper-Bennun <torin@maxiluxsystems.com> | 2021-03-03 13:31:52 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-30 15:37:01 +0300 |
| commit | b1c19039120a0b99ce5ac0e5694a46b9b85e69cf (patch) | |
| tree | f0a41ae201004df85900540b102ee37d6ca8ed06 /drivers/net/can/m_can | |
| parent | 779c33c0aabd427d88478bd9135e6ce82ab58c5b (diff) | |
| download | linux-b1c19039120a0b99ce5ac0e5694a46b9b85e69cf.tar.xz | |
can: m_can: m_can_do_rx_poll(): fix extraneous msg loss warning
[ 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>
Diffstat (limited to 'drivers/net/can/m_can')
| -rw-r--r-- | drivers/net/can/m_can/m_can.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index fbb970220c2d..e87c3bb82081 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -520,9 +520,6 @@ 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--; |