linux-kernel - [PATCH 04/10] dma: imx-sdma: update sdma channel status for cyclic dma

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Message-ID: <1463456876-10580-5-git-send-email-jiada_wang@mentor.com>
Date:	Tue, 17 May 2016 12:47:50 +0900
From:	Jiada Wang <jiada_wang@...tor.com>
To:	<vinod.koul@...el.com>, <dan.j.williams@...el.com>
CC:	<dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<shawnguo@...nel.com>, <kernel@...gutronix.de>,
	<george_davis@...tor.com>, <jiada_wang@...tor.com>
Subject: [PATCH 04/10] dma: imx-sdma: update sdma channel status for cyclic dma

Previously for cyclic dma mode, once sdma fails sdma channel status will
be set to DMA_ERROR, unless the transfer is prepared again, sdmac status
will always be kept to DMA_ERROR, even the transfer for following buffers
is successful.

This patch updates sdmac status to the status of current buffer descriptor.

Signed-off-by: Jiada Wang <jiada_wang@...tor.com>
---
 drivers/dma/imx-sdma.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 1489de0..36f5e39 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -670,6 +670,8 @@ static void sdma_handle_channel_loop(struct sdma_channel *sdmac)
 
 		if (bd->mode.status & BD_RROR)
 			sdmac->status = DMA_ERROR;
+		else
+			sdmac->status = DMA_IN_PROGRESS;
 
 		bd->mode.status &= ~BD_RROR;
 		bd->mode.status |= BD_DONE;
-- 
2.4.5