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

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Message-ID: <0ed5082f-0280-16c0-7410-f6a90262bcee@epam.com>
Date:   Tue, 4 Aug 2020 06:35:20 +0000
From:   Oleksandr Andrushchenko <Oleksandr_Andrushchenko@...m.com>
To:     Jürgen Groß <jgross@...e.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:     "sstabellini@...nel.org" <sstabellini@...nel.org>,
        "dan.carpenter@...cle.com" <dan.carpenter@...cle.com>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>
Subject: Re: [PATCH 2/6] drm/xen-front: Fix misused IS_ERR_OR_NULL checks


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

Thank you

>
>
> Juergen