github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-05 04:56:13 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

mtd: rawnand: renesas: Add missing check after DMA map

Browse Source 
The DMA map functions can fail and should be tested for errors.

Fixes: d8701fe890 ("mtd: rawnand: renesas: Add new NAND controller driver")
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Fourier <fourier.thomas@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Thomas Fourier 2025-07-02 10:01:06 +02:00 committed by Miquel Raynal
parent fdfb040d0b
commit 79e441ee47
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/mtd/nand/raw/renesas-nand-controller.c
View File

@ -426,6 +426,9 @@ static int rnandc_read_page_hw_ecc(struct nand_chip *chip, u8 *buf,
/* Configure DMA */
dma_addr = dma_map_single(rnandc->dev, rnandc->buf, mtd->writesize,
DMA_FROM_DEVICE);
if (dma_mapping_error(rnandc->dev, dma_addr))
return -ENOMEM;
writel(dma_addr, rnandc->regs + DMA_ADDR_LOW_REG);
writel(mtd->writesize, rnandc->regs + DMA_CNT_REG);
writel(DMA_TLVL_MAX, rnandc->regs + DMA_TLVL_REG);
@ -606,6 +609,9 @@ static int rnandc_write_page_hw_ecc(struct nand_chip *chip, const u8 *buf,
/* Configure DMA */
dma_addr = dma_map_single(rnandc->dev, (void *)rnandc->buf, mtd->writesize,
DMA_TO_DEVICE);
if (dma_mapping_error(rnandc->dev, dma_addr))
return -ENOMEM;
writel(dma_addr, rnandc->regs + DMA_ADDR_LOW_REG);
writel(mtd->writesize, rnandc->regs + DMA_CNT_REG);
writel(DMA_TLVL_MAX, rnandc->regs + DMA_TLVL_REG);