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

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commit 6c4dab38431fee3d39a841d66ba6f2890b31b005 upstream.

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

Fixes: 4774fb0a48 ("mtd: nand/fsmc: Add DMA support")
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Fourier <fourier.thomas@gmail.com>
Rule: add
Link: https://lore.kernel.org/stable/20250702065806.20983-2-fourier.thomas%40gmail.com
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Fourier 2025-07-07 09:39:37 +02:00 • committed by Greg Kroah-Hartman
commit 4a389f6dc9
1 changed files with 2 additions and 0 deletions
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2
drivers/mtd/nand/raw/fsmc_nand.c
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@ -492,6 +492,8 @@ 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;