Re: [PATCH v9 0/4] driver core: add probe error check helper

[Mark Brown]

On Thu, Jul 30, 2020 at 10:46:31AM -0700, Dmitry Torokhov wrote:
> On Thu, Jul 30, 2020 at 9:49 AM Mark Brown <broonie@xxxxxxxxxx> wrote:

> > The error messages are frequently in the caller rather than the
> > frameworks, it's often helpful for the comprehensibility of the error
> > messages especially in cases where things may be legitimately absent.

> Not for deferral. All you need to know in this case is:

> "device A is attempting to request resource B which is not ready yet"

> There is nothing to handle on the caller part except to float the error up.

You can sometimes do a better job of explaining what the resource you
were looking for was, and of course you still need diagnostics in the
non-deferral case.  Whatever happens we'll need a lot of per-driver
churn, either removing existing diagnostics that get factored into cores
or updating to use this new API.

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