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

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commit 17cabf571e
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>
This commit is contained in:
Chris Wilson 2015-03-27 11:02:10 +00:00 • committed by Daniel Vetter
parent 9d918c157f
commit 743e78c1d7
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/i915/i915_gem_execbuffer.c
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@ -1547,7 +1547,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
goto err; goto err;
} }
if (i915_needs_cmd_parser(ring)) { if (i915_needs_cmd_parser(ring) && args->batch_len) {
batch_obj = i915_gem_execbuffer_parse(ring, batch_obj = i915_gem_execbuffer_parse(ring,
&shadow_exec_entry, &shadow_exec_entry,
eb, eb,