[Bug 66990] [sna snb/ivb] corruption with chromium

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66990

--- Comment #34 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to comment #33)
> No, that's not it, sorry. I can still reproduce it with "SNA compiled from
> 2.21.14-27-g9645e71".
> 
> I'll retest with latest drm-nightly-intel

Can you also try with the quick little hack from c31

diff --git a/src/sna/sna_composite.c b/src/sna/sna_composite.c
index 58dd356..6f24eeb 100644
--- a/src/sna/sna_composite.c
+++ b/src/sna/sna_composite.c
@@ -520,7 +520,7 @@ sna_composite_fb(CARD8 op,
        if (mask)
                validate_source(mask);

-       if (mask == NULL &&
+       if (mask == NULL && 0 &&
            src->pDrawable &&
            dst->pDrawable->bitsPerPixel >= 8 &&
            src->filter != PictFilterConvolution &&

to sanity check that I am barking up the right tree.

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