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drm/i915: Initialize obj->pages before use by i915_gem_object_do_bit17_swizzle()

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If we leave obj->pages set to NULL before attempting to deswizzle them,
then an OOPS is well deserved.

Fixes regression introduced in commit 9da3da660d
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri Jun 1 15:20:22 2012 +0100

    drm/i915: Replace the array of pages with a scatterlist

Reported-and-tested-by: Krzysztof Kolasa
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2012-10-19 15:51:06 +01:00 committed by Daniel Vetter
parent c31407a367
commit 74ce6b6c63
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/i915_gem.c
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@ -1825,10 +1825,11 @@ i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj)
sg_set_page(sg, page, PAGE_SIZE, 0);
}
obj->pages = st;
if (i915_gem_object_needs_bit17_swizzle(obj))
i915_gem_object_do_bit_17_swizzle(obj);
obj->pages = st;
return 0;
err_pages: