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Commit 3544d287 authored by Muhammad Hamza Farooq's avatar Muhammad Hamza Farooq Committed by Vinod Koul
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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
DMA_COMPLETE.

Signed-off-by: default avatarMuhammad Hamza Farooq <mfarooq@visteon.com>
Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
[Niklas: add explanation in commit message]
Signed-off-by: default avatarNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 3565fe53

drivers/dma/sh/rcar-dmac.c

+4 −0
Original line number Diff line number Diff line
@@ -1202,6 +1202,10 @@ static enum dma_status rcar_dmac_tx_status(struct dma_chan *chan, 
	residue = rcar_dmac_chan_get_residue(rchan, cookie);

	spin_unlock_irqrestore(&rchan->lock, flags);



	/* if there's no residue, the cookie is complete */

	if (!residue)

		return DMA_COMPLETE;



	dma_set_residue(txstate, residue);



	return status;