linux-kernel - [PATCH 3/7] mtd: rawnand: marvell: Use dma_request_chan() instead dma_request_slave

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Date:   Thu, 27 Feb 2020 14:37:45 +0200
From:   Peter Ujfalusi <peter.ujfalusi@...com>
To:     <vigneshr@...com>, <miquel.raynal@...tlin.com>, <han.xu@....com>,
        <richard@....at>, <mripard@...nel.org>, <wens@...e.org>,
        <mcoquelin.stm32@...il.com>, <alexandre.torgue@...com>
CC:     <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <vkoul@...nel.org>
Subject: [PATCH 3/7] mtd: rawnand: marvell: Use dma_request_chan() instead dma_request_slave_channel()

dma_request_slave_channel() is a wrapper on top of dma_request_chan()
eating up the error code.

Use using dma_request_chan() directly to return the real error code.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
---
 drivers/mtd/nand/raw/marvell_nand.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/nand/raw/marvell_nand.c b/drivers/mtd/nand/raw/marvell_nand.c
index b6c7e1903396..911430cca7c8 100644
--- a/drivers/mtd/nand/raw/marvell_nand.c
+++ b/drivers/mtd/nand/raw/marvell_nand.c
@@ -2743,11 +2743,14 @@ static int marvell_nfc_init_dma(struct marvell_nfc *nfc)
 	if (ret)
 		return ret;
 
-	nfc->dma_chan =	dma_request_slave_channel(nfc->dev, "data");
-	if (!nfc->dma_chan) {
-		dev_err(nfc->dev,
-			"Unable to request data DMA channel\n");
-		return -ENODEV;
+	nfc->dma_chan =	dma_request_chan(nfc->dev, "data");
+	if (IS_ERR(nfc->dma_chan)) {
+		ret = PTR_ERR(nfc->dma_chan);
+		nfc->dma_chan = NULL;
+		if (ret != -EPROBE_DEFER)
+			dev_err(nfc->dev, "DMA channel request failed: %d\n",
+				ret);
+		return ret;
 	}
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
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