linux-kernel - Re: [PATCH -next] drm/vgem: Fix return value check in vgem

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Date:   Mon, 22 May 2017 09:48:05 +0200
From:   Daniel Vetter <daniel@...ll.ch>
To:     Chris Wilson <chris@...is-wilson.co.uk>,
        Wei Yongjun <weiyj.lk@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Dave Jiang <dave.jiang@...el.com>,
        Miklos Szeredi <mszeredi@...hat.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Sean Paul <seanpaul@...omium.org>,
        Laura Abbott <labbott@...hat.com>,
        Matthew Auld <matthew.auld@...el.com>,
        Wei Yongjun <weiyongjun1@...wei.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] drm/vgem: Fix return value check in vgem_init()

On Sun, May 21, 2017 at 01:09:05PM +0100, Chris Wilson wrote:
> On Sun, May 21, 2017 at 01:19:39AM +0000, Wei Yongjun wrote:
> > From: Wei Yongjun <weiyongjun1@...wei.com>
> > 
> > In case of error, the function platform_device_register_simple() returns
> > ERR_PTR() and never returns NULL. The NULL test in the return value
> > check should be replaced with IS_ERR().
> > 
> > Fixes: 315f0242aa2b ("drm/vgem: Convert to a struct drm_device subclass")
> 
> This is wrong, the bug was introduced in
> af33a9190d02 ("drm/vgem: Enable dmabuf import interfaces")
> not that it matters since it is the same tag.

Fixed.

> > Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
> 
> Checked it is an ERR_PTR return on failure, so
> Reviewed-by: Chris Wilson <chris@...is-wilson.co.uk>

Applied, thanks for patch&review.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch