commit 907bd68a2edc491849e2fdcfe52c4596627bca94 upstream.

Having a cyclic DMA, a residue 0 is not an indication of a completed
DMA. In case of cyclic DMA make sure that dma_set_residue() is called
and with this a residue of 0 is forwarded correctly to the caller.

Fixes: 3544d287 ("dmaengine: rcar-dmac: use result of updated get_residue in tx_status")
Signed-off-by: NDirk Behme <dirk.behme@de.bosch.com>
Signed-off-by: NAchim Dahlhoff <Achim.Dahlhoff@de.bosch.com>
Signed-off-by: NHiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: NYao Lihua <ylhuajnu@outlook.com>
Reviewed-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: <stable@vger.kernel.org> # v4.8+
Signed-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>