24 Oct
2016
24 Oct
'16
6:21 p.m.
On Wed, Oct 19, 2016 at 02:21:05PM -0300, Javier Martinez Canillas wrote:
If snd_soc_find_dai() doesn't find a DAI in soc_bind_dai_link(), a error message is printed and an -EPROBE_DEFER errno code returned to the caller.
But since many probe retries can happen before a resource is available, the printed messages can spam the kernel log buffer and slow the boot.
The information is useful to know that a dependency was not meet and a defer happened, but isn't necessary to print it on each probe deferral.
This then turns any subsequent failure into a silent one which isn't great for diagnostics. It'd be better to look into trying to avoid the retries in the first place, Raphael's dependency graph stuff looks very promising here.