[PATCH] Revert "DRI2: re-allocate DRI2 drawable if pixmap serial changes"

[Keith Packard]

Eric Anholt <eric at anholt.net> writes:

> This reverts commit 3209b094a3b1466b579e8020e12a4f3fa78a5f3f.  After a
> long debug session by Paul Berry, it appears that this was the commit
> that has been producing sporadic failures in piglit front buffer
> rendering tests for the last several years.

The essential requirement is that a DRM client receive notification each
time the buffer has changed. DRM2 sends InvalidateBuffers events each
time the window size changes, which matches the semantics of this patch.

I can't see any reason to invalidate the buffer more often than this; I
think we'll have to assume that this bug was actually caused by some
other buffer management bug and that this old patch simply masked the
problem found then.

Reviewed-by: Keith Packard <keithp at keithp.com>

-- 
keith.packard at intel.com
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