b554ad054b
prevent double sleep(): callers to sleep() need to be serialized as there can only be one process sleeping at a time. plrlock and plwlock do this. wait for dma to complete in plwrite(): we have to wait for the dma to complete before touching plbuf again. maintain COPEN flag in archopen()/archclose(): when open fails because it was in use, clear the COPEN flag, so archclose() wont screw stuff up. |
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