On Mon, Mar 02, 2020 at 11:26:17PM +0100, Daniel Vetter wrote:
> It's (almost, there's some iommu stuff without significance) right
> above the drm_dev_put().
> 
> This is made possible by a preceeding patch which added a drmm_
> cleanup action to drm_mode_config_init(), hence all we need to do to
> ensure that drm_mode_config_cleanup() is run on final drm_device
> cleanup is check the new error code for _init().
> 
> Aside: Another driver with a bit much devm_kzalloc, which should
> probably use drmm_kzalloc instead ...
> 
> v2: Explain why this cleanup is possible (Laurent).
> 
> v3: Jump out at the right label (Francesco)
> 
> v4: Try again, kbuild caught that I didn't build test this properly
> ...
> 
> v5: Use drmm_mode_config_init() for more clarity (Sam, Thomas)
> 
> Cc: Sam Ravnborg <s...@ravnborg.org>
> Cc: Thomas Zimmermann <tzimmerm...@suse.de>
> Cc: Francesco Lavra <francescolavra...@gmail.com>
> Cc: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> Signed-off-by: Daniel Vetter <daniel.vet...@intel.com>
> Cc: Sandy Huang <h...@rock-chips.com>
> Cc: "Heiko Stübner" <he...@sntech.de>
> Cc: linux-arm-ker...@lists.infradead.org
> Cc: linux-rockc...@lists.infradead.org

Acked-by: Sam Ravnborg <s...@ravnborg.org>

> ---
>  drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 14 +++++---------
>  1 file changed, 5 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c 
> b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> index 20ecb1508a22..0f3eb392fe39 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> @@ -135,14 +135,16 @@ static int rockchip_drm_bind(struct device *dev)
>       if (ret)
>               goto err_free;
>  
> -     drm_mode_config_init(drm_dev);
> +     ret = drmm_mode_config_init(drm_dev);
> +     if (ret)
> +             goto err_iommu_cleanup;
>  
>       rockchip_drm_mode_config_init(drm_dev);
>  
>       /* Try to bind all sub drivers. */
>       ret = component_bind_all(dev, drm_dev);
>       if (ret)
> -             goto err_mode_config_cleanup;
> +             goto err_iommu_cleanup;
>  
>       ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);
>       if (ret)
> @@ -173,12 +175,9 @@ static int rockchip_drm_bind(struct device *dev)
>       rockchip_drm_fbdev_fini(drm_dev);
>  err_unbind_all:
>       component_unbind_all(dev, drm_dev);
> -err_mode_config_cleanup:
> -     drm_mode_config_cleanup(drm_dev);
> +err_iommu_cleanup:
>       rockchip_iommu_cleanup(drm_dev);
>  err_free:
> -     drm_dev->dev_private = NULL;
> -     dev_set_drvdata(dev, NULL);
>       drm_dev_put(drm_dev);
>       return ret;
>  }
> @@ -194,11 +193,8 @@ static void rockchip_drm_unbind(struct device *dev)
>  
>       drm_atomic_helper_shutdown(drm_dev);
>       component_unbind_all(dev, drm_dev);
> -     drm_mode_config_cleanup(drm_dev);
>       rockchip_iommu_cleanup(drm_dev);
>  
> -     drm_dev->dev_private = NULL;
> -     dev_set_drvdata(dev, NULL);
>       drm_dev_put(drm_dev);
>  }
>  
> -- 
> 2.24.1
> 
> _______________________________________________
> dri-devel mailing list
> dri-de...@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
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