i965,meta: Stop unlocking the texture to try and prevent deadlocks.
Unlocking the texture is not safe: another thread could come in and grab it. Now that we use a recursive mutex, this should work. This also fixes texture lock deadlocks in the new meta fast clear path. Signed-off-by:Kenneth Graunke <kenneth@whitecape.org> Reviewed-by:
Kristian Høgsberg <krh@bitplanet.net> Tested-by:
Chris Forbes <chrisf@ijw.co.nz>