This is a note to let you know that I've just added the patch titled can: m_can: m_can_rx_peripheral(): fix RX being blocked by errors to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: can-m_can-m_can_rx_peripheral-fix-rx-being-blocked-b.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit cd1251860637913d920fc10dfc11c528bc3bf0d4 Author: Torin Cooper-Bennun <torin@xxxxxxxxxxxxxxxxxx> Date: Wed Mar 3 14:43:51 2021 +0000 can: m_can: m_can_rx_peripheral(): fix RX being blocked by errors [ Upstream commit e98d9ee64ee2cc9b1d1a8e26610ec4d0392ebe50 ] For M_CAN peripherals, m_can_rx_handler() was called with quota = 1, which caused any error handling to block RX from taking place until the next time the IRQ handler is called. This had been observed to cause RX to be blocked indefinitely in some cases. This is fixed by calling m_can_rx_handler with a sensibly high quota. Fixes: f524f829b75a ("can: m_can: Create a m_can platform framework") Link: https://lore.kernel.org/r/20210303144350.4093750-1-torin@xxxxxxxxxxxxxxxxxx Suggested-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> Signed-off-by: Torin Cooper-Bennun <torin@xxxxxxxxxxxxxxxxxx> Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 6952d5b396e8..6f0bf5db885c 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -882,7 +882,7 @@ static int m_can_rx_peripheral(struct net_device *dev) { struct m_can_classdev *cdev = netdev_priv(dev); - m_can_rx_handler(dev, 1); + m_can_rx_handler(dev, M_CAN_NAPI_WEIGHT); m_can_enable_all_interrupts(cdev);