linux-kernel - Re: [PATCH 2/6] drm/xen-front: Fix misused IS_ERR_OR

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Date:   Tue, 4 Aug 2020 08:12:46 +0200
From:   Jürgen Groß <jgross@...e.com>
To:     Oleksandr Andrushchenko <andr2000@...il.com>,
        xen-devel@...ts.xenproject.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, boris.ostrovsky@...cle.com,
        airlied@...ux.ie, daniel@...ll.ch
Cc:     sstabellini@...nel.org, dan.carpenter@...cle.com,
        intel-gfx@...ts.freedesktop.org,
        Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>
Subject: Re: [PATCH 2/6] drm/xen-front: Fix misused IS_ERR_OR_NULL checks

On 31.07.20 14:51, Oleksandr Andrushchenko wrote:
> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>
> 
> The patch c575b7eeb89f: "drm/xen-front: Add support for Xen PV
> display frontend" from Apr 3, 2018, leads to the following static
> checker warning:
> 
> 	drivers/gpu/drm/xen/xen_drm_front_gem.c:140 xen_drm_front_gem_create()
> 	warn: passing zero to 'ERR_CAST'
> 
> drivers/gpu/drm/xen/xen_drm_front_gem.c
>     133  struct drm_gem_object *xen_drm_front_gem_create(struct drm_device *dev,
>     134                                                  size_t size)
>     135  {
>     136          struct xen_gem_object *xen_obj;
>     137
>     138          xen_obj = gem_create(dev, size);
>     139          if (IS_ERR_OR_NULL(xen_obj))
>     140                  return ERR_CAST(xen_obj);
> 
> Fix this and the rest of misused places with IS_ERR_OR_NULL in the
> driver.
> 
> Fixes:  c575b7eeb89f: "drm/xen-front: Add support for Xen PV display frontend"

Again forgot to Cc stable?


Juergen