linux-kernel - Re: [PATCH 5/5] firmware: add DECLARE_FW_CUSTOM

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Date:   Fri, 16 Dec 2016 10:26:09 +0100
From:   "Luis R. Rodriguez" <mcgrof@...nel.org>
To:     Jacek Anaszewski <jacek.anaszewski@...il.com>
Cc:     "Luis R. Rodriguez" <mcgrof@...nel.org>,
        gregkh@...uxfoundation.org, ming.lei@...onical.com,
        daniel.wagner@...-carit.de, teg@...m.no, mchehab@....samsung.com,
        zajec5@...il.com, linux-kernel@...r.kernel.org,
        markivx@...eaurora.org, stephen.boyd@...aro.org,
        broonie@...nel.org, zohar@...ux.vnet.ibm.com, tiwai@...e.de,
        johannes@...solutions.net, chunkeey@...glemail.com,
        hauke@...ke-m.de, jwboyer@...oraproject.org,
        dmitry.torokhov@...il.com, dwmw2@...radead.org, jslaby@...e.com,
        torvalds@...ux-foundation.org, luto@...capital.net,
        fengguang.wu@...el.com, rpurdie@...ys.net,
        j.anaszewski@...sung.com, Abhay_Salunke@...l.com,
        Julia.Lawall@...6.fr, Gilles.Muller@...6.fr, nicolas.palix@...g.fr,
        dhowells@...hat.com, bjorn.andersson@...aro.org,
        arend.vanspriel@...adcom.com, kvalo@...eaurora.org,
        linux-leds@...r.kernel.org, woogyom.kim@...il.com
Subject: Re: [PATCH 5/5] firmware: add DECLARE_FW_CUSTOM_FALLBACK() annotation

On Thu, Dec 15, 2016 at 10:32:12AM +0100, Jacek Anaszewski wrote:
> > diff --git a/Documentation/driver-api/firmware/fallback-mechanisms.rst b/Documentation/driver-api/firmware/fallback-mechanisms.rst
> > index 955c11d6ff9d..b51673e40439 100644
> > --- a/Documentation/driver-api/firmware/fallback-mechanisms.rst
> > +++ b/Documentation/driver-api/firmware/fallback-mechanisms.rst
> > @@ -184,8 +184,11 @@ load firmware for you through a custom path.
> > 
> >  The custom fallback mechanism can often be enabled by mistake. We currently
> >  have only 2 users of it, and little justification to enable it for other users.
> > -Since it is a common driver developer mistake to enable it, help police for
> > -new users of the custom fallback mechanism with::
> > +Since it is a common driver developer mistake to enable it, driver developers
> > +should use DECLARE_FW_CUSTOM_FALLBACK() to both white-list and validate their
> > +use and also refer to the documentation for the custom loading solution.
> > +
> > +Invalid users of the custom fallback mechanism can be policed using::
> 
> double colon at the end of line

That is on purpose for rst files, for use with the new trendy hipster
Sphinx documentation format.

> > 
> >          $ export COCCI=scripts/coccinelle/api/request_firmware-avoid-init-probe-init.cocci
> >          $ make coccicheck MODE=report

It will kind of blockquote the above.

> > diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
> > index 5377f22ff994..04161428ee3b 100644
> > --- a/drivers/leds/leds-lp55xx-common.c
> > +++ b/drivers/leds/leds-lp55xx-common.c
> > @@ -219,6 +219,7 @@ static void lp55xx_firmware_loaded(const struct firmware *fw, void *context)
> >  	release_firmware(chip->fw);
> >  }
> > 
> > +DECLARE_FW_CUSTOM_FALLBACK("Documentation/leds/leds-lp55xx.txt");
> >  static int lp55xx_request_firmware(struct lp55xx_chip *chip)
> >  {
> 
> For this LED class driver:
> 
> Acked-by: Jacek Anaszewski <j.anaszewski@...sung.com>

Thanks, amended!

  Luis