dmaengine: rcar-dmac: use result of updated get_residue in tx_status

The hardware might have complete the transfer but the interrupt handler
might not have had a chance to run. If rcar_dmac_chan_get_residue()
which reads HW registers finds that there is no residue return

Signed-off-by: Muhammad Hamza Farooq <>
Signed-off-by: Geert Uytterhoeven <>
[Niklas: add explanation in commit message]
Signed-off-by: Niklas Söderlund <>
Acked-by: Laurent Pinchart <>
Signed-off-by: Vinod Koul <>

(cherry picked from commit 3544d2878817bd139dda238cdd86a15e1c03d037)
Signed-off-by: Fabrizio Castro <>
Reviewed-by: Biju Das <>
Signed-off-by: Ben Hutchings <>
1 file changed