[PATCH 1/2] mtd: rawnand: stm32_fmc2: Fix dma_map_sg error check

[Jack Wang]

dma_map_sg return 0 on error, in case of error return -EIO.

Cc: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Cc: Richard Weinberger <richard@xxxxxx>
Cc: Vignesh Raghavendra <vigneshr@xxxxxx>
Cc: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
Cc: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx>
Cc: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
Cc: Christophe Kerello <christophe.kerello@xxxxxxxxxxx>
Cc: Cai Huoqing <cai.huoqing@xxxxxxxxx>
Cc: linux-mtd@xxxxxxxxxxxxxxxxxxx
Cc: linux-stm32@xxxxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Fixes: 2cd457f328c1 ("mtd: rawnand: stm32_fmc2: add STM32 FMC2 NAND flash controller driver")
Signed-off-by: Jack Wang <jinpu.wang@xxxxxxxxx>
---
 drivers/mtd/nand/raw/stm32_fmc2_nand.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/nand/raw/stm32_fmc2_nand.c b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
index 87c1c7dd97eb..a0c825af19fa 100644
--- a/drivers/mtd/nand/raw/stm32_fmc2_nand.c
+++ b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
@@ -862,8 +862,8 @@ static int stm32_fmc2_nfc_xfer(struct nand_chip *chip, const u8 *buf,
 
 	ret = dma_map_sg(nfc->dev, nfc->dma_data_sg.sgl,
 			 eccsteps, dma_data_dir);
-	if (ret < 0)
-		return ret;
+	if (!ret)
+		return -EIO;
 
 	desc_data = dmaengine_prep_slave_sg(dma_ch, nfc->dma_data_sg.sgl,
 					    eccsteps, dma_transfer_dir,
@@ -893,8 +893,10 @@ static int stm32_fmc2_nfc_xfer(struct nand_chip *chip, const u8 *buf,
 
 		ret = dma_map_sg(nfc->dev, nfc->dma_ecc_sg.sgl,
 				 eccsteps, dma_data_dir);
-		if (ret < 0)
+		if (!ret) {
+			ret = -EIO;
 			goto err_unmap_data;
+		}
 
 		desc_ecc = dmaengine_prep_slave_sg(nfc->dma_ecc_ch,
 						   nfc->dma_ecc_sg.sgl,
-- 
2.34.1