linux-kernel - Re: [PATCH] drm/bridge: dw-hdmi-cec: Make use of the helper function devm_add_action_or

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Date:   Wed, 6 Oct 2021 11:36:21 +0200
From:   Robert Foss <robert.foss@...aro.org>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Cai Huoqing <caihuoqing@...du.com>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/bridge: dw-hdmi-cec: Make use of the helper function devm_add_action_or_reset()

Applied to drm-misc-next

On Thu, 23 Sept 2021 at 01:19, Laurent Pinchart
<laurent.pinchart@...asonboard.com> wrote:
>
> Hi Cai,
>
> Thank you for the patch.
>
> On Wed, Sep 22, 2021 at 08:59:08PM +0800, Cai Huoqing wrote:
> > The helper function devm_add_action_or_reset() will internally
> > call devm_add_action(), and if devm_add_action() fails then it will
> > execute the action mentioned and return the error code. So
> > use devm_add_action_or_reset() instead of devm_add_action()
> > to simplify the error handling, reduce the code.
> >
> > Signed-off-by: Cai Huoqing <caihuoqing@...du.com>
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
>
> > ---
> >  drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c | 6 ++----
> >  1 file changed, 2 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c
> > index 70ab4fbdc23e..c8f44bcb298a 100644
> > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c
> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c
> > @@ -265,11 +265,9 @@ static int dw_hdmi_cec_probe(struct platform_device *pdev)
> >       /* override the module pointer */
> >       cec->adap->owner = THIS_MODULE;
> >
> > -     ret = devm_add_action(&pdev->dev, dw_hdmi_cec_del, cec);
> > -     if (ret) {
> > -             cec_delete_adapter(cec->adap);
> > +     ret = devm_add_action_or_reset(&pdev->dev, dw_hdmi_cec_del, cec);
> > +     if (ret)
> >               return ret;
> > -     }
> >
> >       ret = devm_request_threaded_irq(&pdev->dev, cec->irq,
> >                                       dw_hdmi_cec_hardirq,
>
> --
> Regards,
>
> Laurent Pinchart