On Tue, Feb 16, 2021 at 01:32:35PM +0100, Marc Kleine-Budde wrote:

If the number of blank frames equals the number of missing frames, then
have a look where the message RAM is initialized:

This is the case, but it occurred over a matter of seconds (the frames
were only being sent about twice a second). I've finally got some time
to investigate, so I'll try to find out what's going on.

    https://elixir.bootlin.com/linux/latest/source/drivers/net/can/m_can/tcan4x5x.c#L335

Oh! This doesn't look right :(

I think it's a bad idea to first bring the chip into normal mode and
then initialize the RAM.

I'm unsure whether this caused it, but needless to say, this is bad in
any case!

--
Regards,

Torin Cooper-Bennun
Software Engineer  | maxiluxsystems.com