linux-kernel - [PATCH next] mtd: rawnand: loongson1: Fix error code in ls1x_nand_dma

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Message-ID: <aBSEwag_ducqOwy7@stanley.mountain>
Date: Fri, 2 May 2025 11:39:29 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Keguang Zhang <keguang.zhang@...il.com>
Cc: Miquel Raynal <miquel.raynal@...tlin.com>,
	Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>, linux-mips@...r.kernel.org,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH next] mtd: rawnand: loongson1: Fix error code in
 ls1x_nand_dma_transfer()

The "desc" variable is NULL and PTR_ERR(NULL) is zero/success.  Return
a negative error code instead.

Fixes: d2d10ede04b1 ("mtd: rawnand: Add Loongson-1 NAND Controller Driver")
Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
---
It's hard to know what the patch prefix should be here.  Ideally when we
add a new driver we would use the patch prefix for the driver.

Tired: subsystem: Add driver XXX
Wired: subsystem: XXX: Add driver for XXX

 drivers/mtd/nand/raw/loongson1-nand-controller.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/loongson1-nand-controller.c b/drivers/mtd/nand/raw/loongson1-nand-controller.c
index 6a369b1c7d86..8754bb4f8b56 100644
--- a/drivers/mtd/nand/raw/loongson1-nand-controller.c
+++ b/drivers/mtd/nand/raw/loongson1-nand-controller.c
@@ -371,7 +371,7 @@ static int ls1x_nand_dma_transfer(struct ls1x_nand_host *host, struct ls1x_nand_
 	desc = dmaengine_prep_slave_single(chan, dma_addr, op->len, xfer_dir, DMA_PREP_INTERRUPT);
 	if (!desc) {
 		dev_err(dev, "failed to prepare DMA descriptor\n");
-		ret = PTR_ERR(desc);
+		ret = -ENOMEM;
 		goto err;
 	}
 	desc->callback = ls1x_nand_dma_callback;
-- 
2.47.2