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

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Date:	Mon, 13 May 2013 14:55:52 +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] 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>
---
 drivers/mtd/nand/fsmc_nand.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c
index 911e243..6988fc8 100644
--- a/drivers/mtd/nand/fsmc_nand.c
+++ b/drivers/mtd/nand/fsmc_nand.c
@@ -1032,6 +1032,7 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
 	case USE_DMA_ACCESS:
 		dma_cap_zero(mask);
 		dma_cap_set(DMA_MEMCPY, mask);
+		ret = -ENODEV;
 		host->read_dma_chan = dma_request_channel(mask, filter,
 				pdata->read_dma_priv);
 		if (!host->read_dma_chan) {

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