linux-kernel - Re: [RFC v0 4/8] Input: goodix: use firmware

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Date:	Thu, 28 Jul 2016 14:20:50 +0200
From:	Bastien Nocera <hadess@...ess.net>
To:	Daniel Wagner <daniel.wagner@...-carit.de>,
	Daniel Wagner <wagi@...om.org>,
	Bjorn Andersson <bjorn.andersson@...aro.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Johannes Berg <johannes.berg@...el.com>,
	Kalle Valo <kvalo@...eaurora.org>,
	Ohad Ben-Cohen <ohad@...ery.com>
Cc:	linux-input@...r.kernel.org, linux-kselftest@...r.kernel.org,
	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
	irina.tirdea@...el.com, octavian.purdila@...el.com
Subject: Re: [RFC v0 4/8] Input: goodix: use firmware_stat instead of
 completion

On Thu, 2016-07-28 at 13:59 +0200, Daniel Wagner wrote:
> On 07/28/2016 01:22 PM, Bastien Nocera wrote:
> > On Thu, 2016-07-28 at 09:55 +0200, Daniel Wagner wrote:
> > > From: Daniel Wagner <daniel.wagner@...-carit.de>
> > > 
> > > Loading firmware is an operation many drivers implement in
> > > various
> > > ways
> > > around the completion API. And most of them do it almost in the
> > > same
> > > way. Let's reuse the firmware_stat API which is used also by the
> > > firmware_class loader. Apart of streamlining the firmware loading
> > > states
> > > we also document it slightly better.
> > > 
> > > Signed-off-by: Daniel Wagner <daniel.wagner@...-carit.de>
> > 
> > Irina added and tested that feature, so best for her to comment on
> > this, as I don't have any hardware that would use this feature.
> 
> In case you have any comments on the API, let me know. I'll add Irina
> to 
> the Cc list in the next version.

Looking at the API, I really don't like the mixing of namespaces.
Either it's fw_ or it's firmware_ but not a mix of both.

Also looks like fw_loading_start() would do nothing as the struct is
likely zero initialised, and FW_STATUS_LOADING == 0. Maybe you need an
UNSET enum member?

FW_STATUS_ABORT <- FW_STATUS_ABORTED, to match the adjective suffixes
of the other members. Ditto fw_loading_abort() which doesn't abort
firmware loading but sets the status.

Cheers