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

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Date:   Tue, 4 Aug 2020 08:39:41 +0200
From:   Jürgen Groß <jgross@...e.com>
To:     Oleksandr Andrushchenko <Oleksandr_Andrushchenko@...m.com>,
        Oleksandr Andrushchenko <andr2000@...il.com>,
        "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "boris.ostrovsky@...cle.com" <boris.ostrovsky@...cle.com>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "daniel@...ll.ch" <daniel@...ll.ch>
Cc:     "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
        "sstabellini@...nel.org" <sstabellini@...nel.org>,
        "dan.carpenter@...cle.com" <dan.carpenter@...cle.com>
Subject: Re: [PATCH 2/6] drm/xen-front: Fix misused IS_ERR_OR_NULL checks

On 04.08.20 08:35, Oleksandr Andrushchenko wrote:
> 
> On 8/4/20 9:12 AM, Jürgen Groß wrote:
>> 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?
> 
> I was just not sure if these minor fixes need to go the stable, but I will add

I'm fine both ways.

Its just a reflex when I'm seeing a Fixes: tag but no Cc: stable. :-)


Juergen