linux-kernel - [PATCH] mtd: rawnand: fsmc: Fix error code in fsmc_nand

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Message-ID: <YCqaOZ83OvPOzLwh@mwanda>
Date:   Mon, 15 Feb 2021 18:58:49 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Vipin Kumar <vipin.kumar@...com>
Cc:     Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH] mtd: rawnand: fsmc: Fix error code in fsmc_nand_probe()

If dma_request_channel() fails then the probe fails and it should
return a negative error code, but currently it returns success.

fixes: 4774fb0a48aa ("mtd: nand/fsmc: Add DMA support")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 drivers/mtd/nand/raw/fsmc_nand.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mtd/nand/raw/fsmc_nand.c b/drivers/mtd/nand/raw/fsmc_nand.c
index 0101c0fab50a..a24e2f57fa68 100644
--- a/drivers/mtd/nand/raw/fsmc_nand.c
+++ b/drivers/mtd/nand/raw/fsmc_nand.c
@@ -1077,11 +1077,13 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
 		host->read_dma_chan = dma_request_channel(mask, filter, NULL);
 		if (!host->read_dma_chan) {
 			dev_err(&pdev->dev, "Unable to get read dma channel\n");
+			ret = -ENODEV;
 			goto disable_clk;
 		}
 		host->write_dma_chan = dma_request_channel(mask, filter, NULL);
 		if (!host->write_dma_chan) {
 			dev_err(&pdev->dev, "Unable to get write dma channel\n");
+			ret = -ENODEV;
 			goto release_dma_read_chan;
 		}
 	}
-- 
2.30.0