On Wed, Jun 24, 2020 at 01:41:26PM +0200, Andrzej Hajda wrote:

In case of error during resource acquisition driver should print error
message only in case it is not deferred probe, using probe_err helper
solves the issue. Moreover it records defer probe reason for debugging.

If we silently ignore all deferred probe errors we make it hard for
anyone who is experiencing issues with deferred probe to figure out what
they're missing.  We should at least be logging problems at debug level
so there's something for people to go on without having to hack the
kernel source.

But you can always do:

cat /sys/kernel/debug/devices_deferred

And you will find there deferred probe reason (thanks to patch 2/5).

Eventually if you want it in dmesg anyway, one can adjust probe_err function to log probe error on debug level as well.

Regards

Andrzej

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