On 24.06.2020 15:25, Mark Brown wrote:
> 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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