Re: [PATCH] mscan: fix rx path lockup when returning from polling to irq mode

On 12/26/19 7:51 PM, Florian Faber wrote:

Under load, the RX side of the mscan driver can get stuck while TX still works. Restarting the interface locks up the system. This behaviour could be reproduced reliably on a MPC5121e based system.

The patch fixes the return value of the NAPI polling function (should be the number of processed packets, not constant 1) and the condition under which IRQs are enabled again after polling is finished.

With this patch, no more lockups were observed over a test period of ten days.

Signed-off-by: Florian Faber faber@faberman.de

Applied to linux-can. Please consider using git-send-email in the future, as your mail setup somehow mangles spaces and tabs.

regards, Marc