Re: [PATCH] rtc: cros-ec: Limit RTC alarm range if needed

[Brian Norris <briannorris@chromium.org>]

On Mon, Oct 31, 2022 at 11:26:44AM +0800, Tzung-Bi Shih wrote:
> On Fri, Oct 28, 2022 at 05:54:00PM -0700, Guenter Roeck wrote:
> > Drop error messages in cros_ec_rtc_get() and cros_ec_rtc_set() since the
> > calling code also logs an error and to avoid spurious error messages if
> > setting the alarm ultimately succeeds.
> 
> It only retries for cros_ec_rtc_set().  cros_ec_rtc_get() doesn't emit
> spurious error messages.

All of cros_ec_rtc_get()'s callers were also logging the same message.
So it was redundant. I think the general strategy here was to log the
error(s) in callers (last point before we "exit" the driver), to have
the best chance at context-relevant error messages, or ignoring them
where proper.

It's already a bit dubious to log kernel messages at all in response to
normal sysfs operations. We probably want them in some cases, when
things are particularly unexpected, but it shouldn't be a regular
occurrence, and we certainly don't need *two* log lines for each error.

Technically, if one wants to be super-nitpicky about one purpose per
patch, then maybe a patch to trim the logging, and a patch to fix the
alarm range issues...
...but I think that would be a little silly, and perhaps even harmful.
They are related concerns that should be patched (and probably
backported) together.

Brian