patches dropped from drm-misc-next [Was: Re: [PATCH 00/53] drm: Convert to platform remove callback returning] void

Sun Jun 18 22:39:15 AEST 2023

Hello Doug,

On Sat, Jun 17, 2023 at 10:57:23AM -0700, Doug Anderson wrote:
> On Sat, Jun 17, 2023 at 9:15 AM Uwe Kleine-König
> <u.kleine-koenig at pengutronix.de> wrote:
> >
> > [expanding recipents by the other affected persons]
> >
> > On Thu, Jun 08, 2023 at 09:08:15AM -0700, Doug Anderson wrote:
> > > On Thu, Jun 1, 2023 at 8:40 AM Uwe Kleine-König
> > > <u.kleine-koenig at pengutronix.de> wrote:
> > > >
> > > > Hello,
> > > >
> > > > On Sun, May 07, 2023 at 06:25:23PM +0200, Uwe Kleine-König wrote:
> > > > > this patch series adapts the platform drivers below drivers/gpu/drm
> > > > > to use the .remove_new() callback. Compared to the traditional .remove()
> > > > > callback .remove_new() returns no value. This is a good thing because
> > > > > the driver core doesn't (and cannot) cope for errors during remove. The
> > > > > only effect of a non-zero return value in .remove() is that the driver
> > > > > core emits a warning. The device is removed anyhow and an early return
> > > > > from .remove() usually yields a resource leak.
> > > > >
> > > > > By changing the remove callback to return void driver authors cannot
> > > > > reasonably (but wrongly) assume any more that there happens some kind of
> > > > > cleanup later.
> > > >
> > > > I wonder if someone would volunteer to add the whole series to
> > > > drm-misc-next?!
> > >
> > > It looks as if Neil applied quite a few of them already, so I looked
> > > at what was left...
> > >
> > > I'm a little hesitant to just apply the whole kit-and-caboodle to
> > > drm-misc-next since there are specific DRM trees for a bunch of them
> > > and it would be better if they landed there. ...so I went through all
> > > the patches that still applied to drm-misc-next, then used
> > > 'scripts/get_maintainer.pl --scm' to check if they were maintained
> > > through drm-misc. That still left quite a few patches. I've applied
> > > those ones and pushed to drm-misc-next:
> > >
> > > 71722685cd17 drm/xlnx/zynqmp_dpsub: Convert to platform remove
> > > callback returning void
> > > 1ed54a19f3b3 drm/vc4: Convert to platform remove callback returning void
> > > b957812839f8 drm/v3d: Convert to platform remove callback returning void
> > > e2fd3192e267 drm/tve200: Convert to platform remove callback returning void
> > > 84e6da7ad553 drm/tiny: Convert to platform remove callback returning void
> > > 34cdd1f691ad drm/tidss: Convert to platform remove callback returning void
> > > d665e3c9d37a drm/sun4i: Convert to platform remove callback returning void
> > > 0c259ab19146 drm/stm: Convert to platform remove callback returning void
> > > 9a865e45884a drm/sti: Convert to platform remove callback returning void
> > > 3c855610840e drm/rockchip: Convert to platform remove callback returning void
> > > e41977a83b71 drm/panfrost: Convert to platform remove callback returning void
> > > cef3776d0b5a drm/panel: Convert to platform remove callback returning void
> > > bd296a594e87 drm/mxsfb: Convert to platform remove callback returning void
> > > 38ca2d93d323 drm/meson: Convert to platform remove callback returning void
> > > fd1457d84bae drm/mcde: Convert to platform remove callback returning void
> > > 41a56a18615c drm/logicvc: Convert to platform remove callback returning void
> > > 980ec6444372 drm/lima: Convert to platform remove callback returning void
> > > 82a2c0cc1a22 drm/hisilicon: Convert to platform remove callback returning void
> > > c3b28b29ac0a drm/fsl-dcu: Convert to platform remove callback returning void
> > > a118fc6e71f9 drm/atmel-hlcdc: Convert to platform remove callback returning void
> > > 9a32dd324c46 drm/aspeed: Convert to platform remove callback returning void
> > > 2c7d291c498c drm/arm/malidp: Convert to platform remove callback returning void
> > > a920028df679 drm/arm/hdlcd: Convert to platform remove callback returning void
> > > 1bf3d76a7d15 drm/komeda: Convert to platform remove callback returning void
> >
> > Together with the patches that were applied later the topmost commit
> > from this series is c2807ecb5290 ("drm/omap: Convert to platform remove
> > callback returning void"). This commit was part for the following next
> > tags:
> >
> >         $ git tag -l --contains c2807ecb5290
> >         next-20230609
> >         next-20230613
> >         next-20230614
> >         next-20230615
> >
> > However in next-20230616 they are missing. In next-20230616
> > drm-misc/for-linux-next was cf683e8870bd4be0fd6b98639286700a35088660.
> > Compared to c2807ecb5290 this adds 1149 patches but drops 37 (that are
> > also not included with a different commit id). The 37 patches dropped
> > are 13cdd12a9f934158f4ec817cf048fcb4384aa9dc..c2807ecb5290:
> >
> >         $ git shortlog -s 13cdd12a9f934158f4ec817cf048fcb4384aa9dc..c2807ecb5290
> >              1  Christophe JAILLET
> >              2  Jessica Zhang
> >              5  Karol Wachowski
> >              1  Laura Nao
> >             27  Uwe Kleine-König
> >              1  Wang Jianzheng
> >
> >
> > I guess this was done by mistake because nobody told me about dropping
> > my/these patches? Can c2807ecb5290 please be merged into drm-misc-next
> > again?
> 
> Actually, it was probably a mistake that these patches got merged to
> linuxnext during the 4 days that you noticed. However, your patches
> aren't dropped and are still present in drm-misc-next.
> 
> drm-misc has a bit of a unique model and it's documented fairly well here:
> 
> https://drm.pages.freedesktop.org/maintainer-tools/drm-misc.html

Is there a flaw then in this unique model (or its implementation) when
drm-misc/for-linux-next moves in a non-fast-forward manner? This isn't
expected, is it?

> The key is that committers can commit to drm-misc-next _at any time_
> regardless of the merge window. The drm-misc merge strategy makes this
> OK. Specifically, when it's late in the linux cycle then drm-misc-next
> is supposed to stop merging to linuxnext. Then, shortly after the
> merge window closes, patches will start flowing again.
> 
> So basically your patches are landed and should even keep the same git
> hashes when they eventually make it to Linux. They just won't land for
> another release cycle of Linux.

OK, c2807ecb5290 is still included in drm-misc-next. So while I don't
understand the whole model, the patches at least seem to be scheduled to
go in during the next merge window.

> Hope that makes sense!

I hope so, too :-)

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |
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