linux-kernel - Re: [PATCH] media: staging: rkisp1: avoid unused variable warning

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Date:   Wed, 8 Apr 2020 21:08:48 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Ezequiel Garcia <ezequiel@...labora.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Helen Koike <helen.koike@...labora.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Jacob Chen <jacob2.chen@...k-chips.com>,
        Shunqian Zheng <zhengsq@...k-chips.com>,
        Yichong Zhong <zyc@...k-chips.com>,
        Jacob Chen <cc@...k-chips.com>,
        Eddie Cai <eddie.cai.linux@...il.com>,
        Jeffy Chen <jeffy.chen@...k-chips.com>,
        Allon Huang <allon.huang@...k-chips.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Dafna Hirschfeld <dafna.hirschfeld@...labora.com>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        driverdevel <devel@...verdev.osuosl.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Rockchip SoC support" 
        <linux-rockchip@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] media: staging: rkisp1: avoid unused variable warning

On Wed, Apr 8, 2020 at 7:56 PM Ezequiel Garcia <ezequiel@...labora.com> wrote:
>
> On Wed, 2020-04-08 at 17:52 +0200, Arnd Bergmann wrote:
> > When compile-testing with CONFIG_OF disabled, we get a warning
> > about an unused variable, and about inconsistent Kconfig dependencies:
> >
> > WARNING: unmet direct dependencies detected for PHY_ROCKCHIP_DPHY_RX0
> >   Depends on [n]: STAGING [=y] && STAGING_MEDIA [=y] && MEDIA_SUPPORT [=m] && (ARCH_ROCKCHIP [=n] || COMPILE_TEST [=y]) && OF [=n]
> >   Selected by [m]:
> >   - VIDEO_ROCKCHIP_ISP1 [=m] && STAGING [=y] && STAGING_MEDIA [=y] && MEDIA_SUPPORT [=m] && VIDEO_V4L2 [=m] && VIDEO_V4L2_SUBDEV_API [=y] &&
> > (ARCH_ROCKCHIP [=n] || COMPILE_TEST [=y])
> >
> > drivers/staging/media/rkisp1/rkisp1-dev.c: In function 'rkisp1_probe':
> > drivers/staging/media/rkisp1/rkisp1-dev.c:457:22: error: unused variable 'node' [-Werror=unused-variable]
> >   457 |  struct device_node *node = pdev->dev.of_node;
> >
> > Simply open-coding the pointer dereference in the only place
> > the variable is used avoids the warning in all configurations,
> > so we can allow compile-testing as well.
> >
>
> Hello Arnd,
>
> Thanks for your patch.
>
> I believe this is already fixed here:
>
> https://patchwork.linuxtv.org/patch/62774/
> https://patchwork.linuxtv.org/patch/62775/

Ok, sorry for the duplicate. I only tested on mainline from a few days ago,
so I must have missed it getting merged in the meantime.

    Arnd