From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 27 Mar 2015 11:02:10 +0000 (+0000)
Subject: drm/i915: Skip allocating shadow batch for 0-length batches
X-Git-Tag: omap-for-v4.1/fixes-rc1~82^2~20^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=743e78c1d726d875b98ff9689cc77c4d3d5d9ae2;p=pandora-kernel.git

drm/i915: Skip allocating shadow batch for 0-length batches

Since

commit 17cabf571e50677d980e9ab2a43c5f11213003ae
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Wed Jan 14 11:20:57 2015 +0000

    drm/i915: Trim the command parser allocations

we may then try to allocate a zero-sized object and attempt to extract
its pages. Understandably this fails.

Testcase: igt/gem_exec_nop #ivb,byt,hsw
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

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