linux-kernel - Re: [PATCH 2/4] media: davinci: vpif: fix unbalanced runtime PM enable

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Date:   Mon, 31 Jan 2022 11:20:08 +0100
From:   Johan Hovold <johan@...nel.org>
To:     "Lad, Prabhakar" <prabhakar.csengg@...il.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Kevin Hilman <khilman@...libre.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-media <linux-media@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, stable@...r.kernel.org
Subject: Re: [PATCH 2/4] media: davinci: vpif: fix unbalanced runtime PM
 enable

Hi Lad,

and sorry about the late reply.

On Tue, Jan 04, 2022 at 06:11:08PM +0000, Lad, Prabhakar wrote:
> Hi Johan,
> 
> Thank you for the patch.
> 
> On Wed, Dec 22, 2021 at 2:20 PM Johan Hovold <johan@...nel.org> wrote:
> >
> > Make sure to disable runtime PM before returning on probe errors.
> >
> > Fixes: 479f7a118105 ("[media] davinci: vpif: adaptions for DT support")
> > Cc: stable@...r.kernel.org      # 4.12: 4024d6f601e3c
> > Cc: Kevin Hilman <khilman@...libre.com>
> > Signed-off-by: Johan Hovold <johan@...nel.org>
> > ---
> >  drivers/media/platform/davinci/vpif.c | 11 +++++++++--
> >  1 file changed, 9 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/media/platform/davinci/vpif.c b/drivers/media/platform/davinci/vpif.c
> > index 9752a5ec36f7..1f5eacf48580 100644
> > --- a/drivers/media/platform/davinci/vpif.c
> > +++ b/drivers/media/platform/davinci/vpif.c
> > @@ -428,6 +428,7 @@ static int vpif_probe(struct platform_device *pdev)
> >         static struct resource *res_irq;
> >         struct platform_device *pdev_capture, *pdev_display;
> >         struct device_node *endpoint = NULL;
> > +       int ret;
> >
> >         vpif_base = devm_platform_ioremap_resource(pdev, 0);
> >         if (IS_ERR(vpif_base))
> > @@ -456,8 +457,8 @@ static int vpif_probe(struct platform_device *pdev)
> >         res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> >         if (!res_irq) {
> >                 dev_warn(&pdev->dev, "Missing IRQ resource.\n");
> > -               pm_runtime_put(&pdev->dev);
> Maybe just add pm_runtime_disable(&pdev->dev); here, rest diff won't
> be required.

I chose to do it this way in order to make the following patches
smaller and easier to review.

Thanks for reviewing.

Johan