linux-kernel - Re: [PATCH v3 1/3] drm/bridge: anx7625: Convert to use devm

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Date:   Tue, 18 Jan 2022 17:24:56 +0800
From:   Hsin-Yi Wang <hsinyi@...omium.org>
To:     Robert Foss <robert.foss@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>, Xin Ji <xji@...logixsemi.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Maxime Ripard <maxime@...no.tech>
Subject: Re: [PATCH v3 1/3] drm/bridge: anx7625: Convert to use devm_kzalloc

On Mon, Jan 17, 2022 at 6:04 PM Hsin-Yi Wang <hsinyi@...omium.org> wrote:
>
> hi Robert,
>
> The second patch depends on "drm/bridge: anx7625: send DPCD command to
> downstream" (https://patchwork.kernel.org/project/dri-devel/patch/1f36f8bf0a48fb2bba17bacec23700e58c1d407d.1641891874.git.xji@analogixsemi.com/).
> But I'm waiting for Xin Ji's response for that patch.
>

Hi Robert,

I've rebased to the latest drm-misc-next and sent v4:
https://lore.kernel.org/lkml/20220118092002.4267-1-hsinyi@chromium.org/T/#t
I also discussed with Xin Ji about the dependent patch and included it
in the series.

Thanks.

> Thanks
>
> On Mon, Jan 17, 2022 at 5:40 PM Robert Foss <robert.foss@...aro.org> wrote:
> >
> > Hey Hsin-Yi,
> >
> >
> > On Thu, 13 Jan 2022 at 09:29, Hsin-Yi Wang <hsinyi@...omium.org> wrote:
> > >
> > > Use devm_kzalloc instead of kzalloc and drop kfree(). Let the memory
> > > handled by driver detach.
> > >
> > > Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
> > > Reviewed-by: Xin Ji <xji@...logixsemi.com>
> > > ---
> > > v2->v3: remove kfree() in anx7625_i2c_remove().
> > > ---
> > >  drivers/gpu/drm/bridge/analogix/anx7625.c | 10 +++-------
> > >  1 file changed, 3 insertions(+), 7 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > index 0b858c78abe8b6..d3661c78770a8f 100644
> > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > @@ -2515,7 +2515,7 @@ static int anx7625_i2c_probe(struct i2c_client *client,
> > >                 return -ENODEV;
> > >         }
> > >
> > > -       platform = kzalloc(sizeof(*platform), GFP_KERNEL);
> > > +       platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
> > >         if (!platform) {
> > >                 DRM_DEV_ERROR(dev, "fail to allocate driver data\n");
> > >                 return -ENOMEM;
> > > @@ -2527,7 +2527,7 @@ static int anx7625_i2c_probe(struct i2c_client *client,
> > >         if (ret) {
> > >                 if (ret != -EPROBE_DEFER)
> > >                         DRM_DEV_ERROR(dev, "fail to parse DT : %d\n", ret);
> > > -               goto free_platform;
> > > +               return ret;
> > >         }
> > >
> > >         platform->client = client;
> > > @@ -2552,7 +2552,7 @@ static int anx7625_i2c_probe(struct i2c_client *client,
> > >         if (!platform->hdcp_workqueue) {
> > >                 dev_err(dev, "fail to create work queue\n");
> > >                 ret = -ENOMEM;
> > > -               goto free_platform;
> > > +               return ret;
> > >         }
> > >
> > >         platform->pdata.intp_irq = client->irq;
> > > @@ -2637,9 +2637,6 @@ static int anx7625_i2c_probe(struct i2c_client *client,
> > >         if (platform->hdcp_workqueue)
> > >                 destroy_workqueue(platform->hdcp_workqueue);
> > >
> > > -free_platform:
> > > -       kfree(platform);
> > > -
> > >         return ret;
> > >  }
> > >
> > > @@ -2666,7 +2663,6 @@ static int anx7625_i2c_remove(struct i2c_client *client)
> > >         if (platform->pdata.audio_en)
> > >                 anx7625_unregister_audio(platform);
> > >
> > > -       kfree(platform);
> > >         return 0;
> > >  }
> > >
> >
> > I just had a look at applying this series, but it fails to apply on
> > drm-misc-next today.
> >
> > Could you send a v4 that applies cleanly, and I'll try to be quick
> > about applying it.
> >
> >
> > Rob.