On Sat, Dec 11, 2021 at 10:30:11PM +0100, Marc Kleine-Budde wrote: > From: Brian Silverman <brian.silverman@xxxxxxxxxxxxxxxxx> > > Commit f58ac1adc76b5beda43c64ef359056077df4d93a upstream. > > With the design of this driver, this condition is often triggered. > However, the counter that this interrupt indicates an overflow is never > read either, so overflowing is harmless. > > On my system, when a CAN bus starts flapping up and down, this locks up > the whole system with lots of interrupts and printks. > > Specifically, this interrupt indicates the CEL field of ECR has > overflowed. All reads of ECR mask out CEL. > > Fixes: e0d1f4816f2a ("can: m_can: add Bosch M_CAN controller support") > Link: https://lore.kernel.org/all/20211129222628.7490-1-brian.silverman@xxxxxxxxxxxxxxxxx > Cc: stable@xxxxxxxxxxxxxxx > Signed-off-by: Brian Silverman <brian.silverman@xxxxxxxxxxxxxxxxx> > Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> > --- > Hey Greg, > > this is > | f58ac1adc76b ("can: m_can: Disable and ignore ELO interrupt") > checrry picked onto v5.10. The patch applied without any problems, > won't know why it didn't work in your side. This worked, thanks. Can I get a working backport for 4.4.y and 4.9.y as well? thanks, greg k-h