Re: flexcan introduced a DIV/0 in kernel

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On 09.04.21 13:21, Marc Kleine-Budde wrote:
On 4/9/21 12:18 PM, Koen Vandeputte wrote:
Hi All,

I just updated kernel 4.14 within OpenWRT from 4.14.224 to 4.14.229
Booting it shows the splat below on each run. [1]


It seems there are 2 patches regarding flexcan which were introduced in
4.14.226

--> ce59ffca5c49 ("can: flexcan: enable RX FIFO after FRZ/HALT valid")
--> bb7c9039a396 ("can: flexcan: assert FRZ bit in flexcan_chip_freeze()")

Reverting these fixes the splat.
This patch should fix the problem:

47c5e474bc1e can: flexcan: flexcan_chip_freeze(): fix chip freeze for missing
bitrate

Greg, can you pick this up for v4.14?

regards,
Marc

Checking kernels 4.4 & 4.9 shows that this fix is also missing over there.


Marc,

Can you confirm that it's also required for these?


Thanks,

Koen




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