mtd: rawnand: stm32_fmc2: Fix dma_map_sg error check

dma_map_sg return 0 on error, in case of error return -EIO. Cc: Miquel Raynal <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Vignesh Raghavendra <[email protected]> Cc: Maxime Coquelin <[email protected]> Cc: Alexandre Torgue <[email protected]> Cc: Philipp Zabel <[email protected]> Cc: Christophe Kerello <[email protected]> Cc: Cai Huoqing <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Signed-off-by: Jack Wang <[email protected]> Reviewed-by: Christophe Kerello <[email protected]> Signed-off-by: Miquel Raynal <[email protected]> Link: https://lore.kernel.org/linux-mtd/[email protected]
caleberi · Sep 21, 2022 · 43b81c2 · 43b81c2
1 parent ddfa68d
commit 43b81c2
Showing 1 changed file with 5 additions and 3 deletions.
diff --git 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,