tree c433a66f0b4b9acd23d3ce3c08d5980795c4eed3
parent 03ee3b1e58266c7e5b155d58f443d94b23d2bd05
author Alexander Graf <agraf@suse.de> 1372553675 +0200
committer Alexander Graf <agraf@suse.de> 1373561485 +0200

PPC: dbdma: Wait for DMA until we have data

We should only start processing DMA requests when we have data to process.
Hold off working through the DMA shuffling until the IDE core told us that
it's ready.

This is required because the guest can program the DMA engine or the IDE
transfer first. Both are legal.

Signed-off-by: Alexander Graf <agraf@suse.de>