WIP: vrend: Skip data transfer for BLOB resources
If there are no IOVs attached to resource or transfer info, and the resource is supposed to be mapped persistent or coherent, then we can skip copying data.
Closes: mesa/mesa#8339
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If there are no IOVs attached to resource or transfer info, and the resource is supposed to be mapped persistent or coherent, then we can skip copying data.
Closes: mesa/mesa#8339