On Wed, May 18, 2016 at 06:57:50PM +0200, Takashi Iwai wrote:
Mark Brown wrote:
It's just shifting the problem around... it sounds like for your use case suppressing the messages until we finish kernel boot would deal with most of the issue in a far more general fashion.
It comes to the question whether this message must be shown verbosely as an error at all. EPROBE_DEFER is usually a mechanism for the delayed probe, and it doesn't indicate an error per se. dev_err() is, OTOH, for real errors that have to be notified to user inevitably. That's why "quiet" boot option still shows it.
We can't tell the difference between something that's delayed and will come up later and something that's just never going to work - missing or misidentified components has always been a common source of errors in ASoC device bringup. There's also just the fact that the noise from deferred probe is not an ASoC specific thing, we need to tackle this at a system level rather than hacking individual cases.