[PATCH] drm/i915: fix possible null pointer dereference

[Chris Wilson]

On Mon, Jul 20, 2015 at 05:59:29PM +0530, Sudip Mukherjee wrote:
> We were dereferencing dev first and then checking if it is NULL. Lets
> check for NULL first and then dereference.

The code is bonkers. Testing for a lack of a correctly constructed
debugfs seq_file inside the debugfs seq_file callback is inane.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre