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 fourier.thomas@gmail.com --- drivers/mtd/nand/raw/fsmc_nand.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/mtd/nand/raw/fsmc_nand.c b/drivers/mtd/nand/raw/fsmc_nand.c index d579d5dd60d6..df61db8ce466 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;