[PATCH -next] drm/vgem: Fix return value check in vgem_init()

[Chris Wilson]

On Sun, May 21, 2017 at 01:19:39AM +0000, Wei Yongjun wrote:
> From: Wei Yongjun <weiyongjun1 at huawei.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.

> Signed-off-by: Wei Yongjun <weiyongjun1 at huawei.com>

Checked it is an ERR_PTR return on failure, so
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre