[PATCH] Ensure blitter quiescience before reading pixels from the framebuffer
bernie at codewiz.org
Wed Jul 18 06:59:57 PDT 2007
Alex Deucher wrote:
> FWIW, I've seen similar issues with EXA on savage.
The codepath I'm fixing here cannot be responsible for
that, but it seems that X is missing protection against
such races in several places.
In the AMD driver, the problem was in the Composite hook.
But I see the Savage driver does not even implement it.
There's a readfb() function that lacks protection, but
apparently it's dead code.
// Bernardo Innocenti
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