Correct the DMA bit flags (UDMA and MWDMA were swapped)
Add workarounds so that we clear ERR and INTR bits before issuing a DMA
Add workarounds so that we stop a live DMA before touching the CTL register
Signed-off-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>