From: Thomas Fourier Date: Mon, 7 Jul 2025 07:39:37 +0000 (+0200) Subject: mtd: rawnand: fsmc: Add missing check after DMA map X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6c4dab38431fee3d39a841d66ba6f2890b31b005;p=thirdparty%2Flinux.git mtd: rawnand: fsmc: Add missing check after DMA map The DMA map functions can fail and should be tested for errors. Fixes: 4774fb0a48aa ("mtd: nand/fsmc: Add DMA support") Cc: stable@vger.kernel.org Signed-off-by: Thomas Fourier Rule: add Link: https://lore.kernel.org/stable/20250702065806.20983-2-fourier.thomas%40gmail.com Signed-off-by: Miquel Raynal --- diff --git a/drivers/mtd/nand/raw/fsmc_nand.c b/drivers/mtd/nand/raw/fsmc_nand.c index d579d5dd60d66..df61db8ce4665 100644 --- a/drivers/mtd/nand/raw/fsmc_nand.c +++ b/drivers/mtd/nand/raw/fsmc_nand.c @@ -503,6 +503,8 @@ static int dma_xfer(struct fsmc_nand_data *host, void *buffer, int len, dma_dev = chan->device; dma_addr = dma_map_single(dma_dev->dev, buffer, len, direction); + if (dma_mapping_error(dma_dev->dev, dma_addr)) + return -EINVAL; if (direction == DMA_TO_DEVICE) { dma_src = dma_addr;