ignore_str to have root cause or known issue description

[fredoh9]

There is array of ignoring error message.
https://github.com/thesofproject/sof-test/blob/master/tools/sof-kernel-log-check.sh#L6

This error message was captured but it is known problem. But there is no description why this is safely ignored.
ignore_str="error: debugfs write failed to idle -16|error: status|iteration [01]"

@marc-hb added comments, #258

Ignoring errors is very dangerous and should be carefully reviewed and extensively documented. At the very least this code should be changed to something like:

# because blabla, see bug 1234
ignore_str="$ignore_str"'|error: debugfs write failed to idle -16'
# because blabla, see bug 5678
ignore_str="$ignore_str"'|error: status'

[marc-hb]

I tig blamed the history of that ignorestr list:

• The iteration [01] exclusion was added by d238c48 which mentions issue dmesg check still influenced by DSP init fail #43
• error: status was added by commit 50f6ccf . It mentions ASoC: SOF: intel: lower print level to dbg if we will reinit DSP linux#1676
• debugfs write failed... was added by initial commit b3b7d8d which is unfortunately not specific.

@aiChaoSONG could you implement and test this line split? For the debugfs write... line leave a # TODO for now.

@xiulipan, @plbossart do you know why this this debugfs write... error must be ignored?

[aiChaoSONG]

@marc-hb I have no idea why debugfs write.. is added, it is far before I joined CI, but some error string in ignore_str is deprecated. I will try to clean up and split ignore_str after Dragon Boat Holiday.

[aiChaoSONG]

@Bin-QA Could you please help to find the reason for each ignore_str? though Marc gives some hint, but from the releated commit's message, It's really hard to know the reason, because the message is not clear.

[aiChaoSONG]

WIP PR: #268