sata_dwc_460ex: fix return value of dma_dwc_xfer_setup()
The caller expects this function to return the DMA channel number on success, while it returns 0... Signed-off-by: NSergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
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