linux-kernel - [PATCH v2] mtd: fsmc_nand: fix error return code in fsmc_nand

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Message-ID: <CAPgLHd_DjX-Bfdf9p6k2t_fy+SjgQanuJjX_WxA1tqewwRe1HA@mail.gmail.com>
Date:	Tue, 14 May 2013 10:30:19 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	dwmw2@...radead.org, grant.likely@...aro.org,
	rob.herring@...xeda.com, artem.bityutskiy@...ux.intel.com,
	linus.walleij@...aro.org, viresh.kumar@...aro.org,
	vipin.kumar@...com
Cc:	yongjun_wei@...ndmicro.com.cn, linux-mtd@...ts.infradead.org,
	devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] mtd: fsmc_nand: fix error return code in fsmc_nand_probe()

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

Fix to return -ENODEV in the dma channel request error handling
case instead of 0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
v1 -> v2: set ret for error cases only
---
 drivers/mtd/nand/fsmc_nand.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c
index 0e5a1d9..95e1768 100644
--- a/drivers/mtd/nand/fsmc_nand.c
+++ b/drivers/mtd/nand/fsmc_nand.c
@@ -1035,12 +1035,14 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
 		host->read_dma_chan = dma_request_channel(mask, filter,
 				pdata->read_dma_priv);
 		if (!host->read_dma_chan) {
+			ret = -ENODEV;
 			dev_err(&pdev->dev, "Unable to get read dma channel\n");
 			goto err_req_read_chnl;
 		}
 		host->write_dma_chan = dma_request_channel(mask, filter,
 				pdata->write_dma_priv);
 		if (!host->write_dma_chan) {
+			ret = -ENODEV;
 			dev_err(&pdev->dev, "Unable to get write dma channel\n");
 			goto err_req_write_chnl;
 		}

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