linux-kernel - Re: [PATCH resend] media: staging: stkwebcam: Restore MEDIA_{USB,CAMERA}

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Date:   Wed, 23 Nov 2022 18:10:57 +0300
From:   Dan Carpenter <error27@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Tommaso Merciai <tommaso.merciai@...rulasolutions.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Andrzej Pietrasiewicz <andrzejtp2010@...il.com>,
        Ricardo Ribalda <ribalda@...omium.org>,
        linux-media@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH resend] media: staging: stkwebcam: Restore
 MEDIA_{USB,CAMERA}_SUPPORT dependencies

On Wed, Nov 23, 2022 at 11:13:31AM +0100, Geert Uytterhoeven wrote:
> Hi Tommaso,
> 
> On Wed, Nov 23, 2022 at 11:08 AM Tommaso Merciai
> <tommaso.merciai@...rulasolutions.com> wrote:
> > On Mon, Nov 21, 2022 at 04:58:33PM +0100, Geert Uytterhoeven wrote:
> > > By moving support for the USB Syntek DC1125 Camera to staging, the
> > > dependencies on MEDIA_USB_SUPPORT and MEDIA_CAMERA_SUPPORT were lost.
> > >
> > > Fixes: 56280c64ecacc971 ("media: stkwebcam: deprecate driver, move to staging")
> >
> > Patch itself looks good but we have some style issue. Applying this
> > patch I got the following warning from checkpatchl:
> >
> > WARNING: Please use correct Fixes: style 'Fixes: <12 chars of sha1> ("<title line>")' - ie: 'Fixes: 56280c64ecac ("media: stkwebcam: deprecate driver, move to staging")'
> > #10:
> >
> > You have to pass only the first 12 chars of the sha1 commit into Fixes
> > msg:
> >
> > Use:
> >
> >  Fixes: 56280c64ecac ("media: stkwebcam: deprecate driver, move to staging")
> >
> > Instead of:
> >
> >  Fixes: 56280c64ecacc971 ("media: stkwebcam: deprecate driver, move to staging")
> 
> I always use 16 chars, to avoid these becoming ambiguous in a few years.
> 

If we assume hashes are randomly distributed and that people commit
100k patches every year then with 12 character we would have 17
collisions every 1000 years.

regards,
dan carpenter