[PATCH 11/59] drm/udl: Use devm_drm_dev_alloc

[Sam Ravnborg]

Hi Daniel.

On Wed, Apr 15, 2020 at 09:39:46AM +0200, Daniel Vetter wrote:
> Also init the fbdev emulation before we register the device, that way
> we can rely on the auto-cleanup and simplify the probe error code even
> more.
> 
> v2: Rebase on top of Thomas' patches to remove the return value from
> drm_fbdev_generic_setup()

with the rebase the changelog in confusing as this patch does nothing of
what is described in the changelog.
Only the title (that is in convinently not available when replying to
email) describes what this patch does.

With the changelog properly adjusted:
Acked-by: Sam Ravnborg <sam at ravnborg.org>

> 
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> Cc: Noralf Trønnes <noralf at tronnes.org>
> Cc: Dave Airlie <airlied at redhat.com>
> Cc: Sean Paul <sean at poorly.run>
> Cc: Thomas Zimmermann <tzimmermann at suse.de>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Cc: Emil Velikov <emil.l.velikov at gmail.com>
> Cc: Sam Ravnborg <sam at ravnborg.org>
> Cc: Thomas Gleixner <tglx at linutronix.de>
> ---
>  drivers/gpu/drm/udl/udl_drv.c | 26 +++++++-------------------
>  1 file changed, 7 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/gpu/drm/udl/udl_drv.c b/drivers/gpu/drm/udl/udl_drv.c
> index 9cc6d075cb40..523f60e02a85 100644
> --- a/drivers/gpu/drm/udl/udl_drv.c
> +++ b/drivers/gpu/drm/udl/udl_drv.c
> @@ -57,27 +57,20 @@ static struct udl_device *udl_driver_create(struct usb_interface *interface)
>  	struct udl_device *udl;
>  	int r;
>  
> -	udl = kzalloc(sizeof(*udl), GFP_KERNEL);
> -	if (!udl)
> -		return ERR_PTR(-ENOMEM);
> -
> -	r = drm_dev_init(&udl->drm, &driver, &interface->dev);
> -	if (r) {
> -		kfree(udl);
> -		return ERR_PTR(r);
> -	}
> +	udl = devm_drm_dev_alloc(&interface->dev, &driver,
> +				 struct udl_device, drm);
> +	if (IS_ERR(udl))
> +		return udl;
>  
>  	udl->udev = udev;
>  	udl->drm.dev_private = udl;
> -	drmm_add_final_kfree(&udl->drm, udl);
>  
>  	r = udl_init(udl);
> -	if (r) {
> -		drm_dev_put(&udl->drm);
> +	if (r)
>  		return ERR_PTR(r);
> -	}
>  
>  	usb_set_intfdata(interface, udl);
> +
>  	return udl;
>  }
>  
> @@ -93,17 +86,13 @@ static int udl_usb_probe(struct usb_interface *interface,
>  
>  	r = drm_dev_register(&udl->drm, 0);
>  	if (r)
> -		goto err_free;
> +		return r;
>  
>  	DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
>  
>  	drm_fbdev_generic_setup(&udl->drm, 0);
>  
>  	return 0;
> -
> -err_free:
> -	drm_dev_put(&udl->drm);
> -	return r;
>  }
>  
>  static void udl_usb_disconnect(struct usb_interface *interface)
> @@ -113,7 +102,6 @@ static void udl_usb_disconnect(struct usb_interface *interface)
>  	drm_kms_helper_poll_fini(dev);
>  	udl_drop_usb(dev);
>  	drm_dev_unplug(dev);
> -	drm_dev_put(dev);
>  }
>  
>  /*
> -- 
> 2.25.1
> 
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