linux-kernel - Re: [PATCH v4 1/2] drm/v3d: Handle errors from IRQ setup.

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Message-ID: <CAApk1dV2muXmJ8q+aimexr4d-5K9uPm0dHDqmrCgF9-0hczb7A@mail.gmail.com>
Date:   Fri, 8 Mar 2019 18:22:26 +0000
From:   Dave Emett <david.emett@...adcom.com>
To:     Eric Anholt <eric@...olt.net>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Thomas Spurden <thomas.spurden@...adcom.com>
Subject: Re: [PATCH v4 1/2] drm/v3d: Handle errors from IRQ setup.

On Fri, 8 Mar 2019 at 17:43, Eric Anholt <eric@...olt.net> wrote:
>
> Noted in review by Dave Emett for V3D 4.2 support.
>
> Signed-off-by: Eric Anholt <eric@...olt.net>

Reviewed-by: Dave Emett <david.emett@...adcom.com>

> ---
>  drivers/gpu/drm/v3d/v3d_drv.c |  8 ++++++--
>  drivers/gpu/drm/v3d/v3d_drv.h |  2 +-
>  drivers/gpu/drm/v3d/v3d_irq.c | 13 +++++++++++--
>  3 files changed, 18 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
> index 3680ebd229f2..f9906cac7a88 100644
> --- a/drivers/gpu/drm/v3d/v3d_drv.c
> +++ b/drivers/gpu/drm/v3d/v3d_drv.c
> @@ -311,14 +311,18 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
>         if (ret)
>                 goto dev_destroy;
>
> -       v3d_irq_init(v3d);
> +       ret = v3d_irq_init(v3d);
> +       if (ret)
> +               goto gem_destroy;
>
>         ret = drm_dev_register(drm, 0);
>         if (ret)
> -               goto gem_destroy;
> +               goto irq_disable;
>
>         return 0;
>
> +irq_disable:
> +       v3d_irq_disable(v3d);
>  gem_destroy:
>         v3d_gem_destroy(drm);
>  dev_destroy:
> diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h
> index d856159bd007..bb58ecb9d9c5 100644
> --- a/drivers/gpu/drm/v3d/v3d_drv.h
> +++ b/drivers/gpu/drm/v3d/v3d_drv.h
> @@ -304,7 +304,7 @@ void v3d_reset(struct v3d_dev *v3d);
>  void v3d_invalidate_caches(struct v3d_dev *v3d);
>
>  /* v3d_irq.c */
> -void v3d_irq_init(struct v3d_dev *v3d);
> +int v3d_irq_init(struct v3d_dev *v3d);
>  void v3d_irq_enable(struct v3d_dev *v3d);
>  void v3d_irq_disable(struct v3d_dev *v3d);
>  void v3d_irq_reset(struct v3d_dev *v3d);
> diff --git a/drivers/gpu/drm/v3d/v3d_irq.c b/drivers/gpu/drm/v3d/v3d_irq.c
> index 69338da70ddc..29d746cfce57 100644
> --- a/drivers/gpu/drm/v3d/v3d_irq.c
> +++ b/drivers/gpu/drm/v3d/v3d_irq.c
> @@ -156,7 +156,7 @@ v3d_hub_irq(int irq, void *arg)
>         return status;
>  }
>
> -void
> +int
>  v3d_irq_init(struct v3d_dev *v3d)
>  {
>         int ret, core;
> @@ -173,13 +173,22 @@ v3d_irq_init(struct v3d_dev *v3d)
>         ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 0),
>                                v3d_hub_irq, IRQF_SHARED,
>                                "v3d_hub", v3d);
> +       if (ret)
> +               goto fail;
> +
>         ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 1),
>                                v3d_irq, IRQF_SHARED,
>                                "v3d_core0", v3d);
>         if (ret)
> -               dev_err(v3d->dev, "IRQ setup failed: %d\n", ret);
> +               goto fail;
>
>         v3d_irq_enable(v3d);
> +       return 0;
> +
> +fail:
> +       if (ret != -EPROBE_DEFER)
> +               dev_err(v3d->dev, "IRQ setup failed: %d\n", ret);
> +       return ret;
>  }
>
>  void
> --
> 2.20.1
>