diff options
| author | Thomas Fourier <fourier.thomas@gmail.com> | 2025-07-07 09:15:50 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-15 12:13:57 +0200 |
| commit | 2529fc0a187368e675d64ec396935f3d04f37823 (patch) | |
| tree | 3bd2e8bfe353dc9a9be57869053cfd0bd20d599e | |
| parent | 3e2d8d39a328c10b455cac5bd352ec43301080a8 (diff) | |
mtd: rawnand: rockchip: Add missing check after DMA map
[ Upstream commit 3b36f86dc47261828f96f826077131a35dd825fd ]
The DMA map functions can fail and should be tested for errors.
Fixes: 058e0e847d54 ("mtd: rawnand: rockchip: NFC driver for RK3308, RK2928 and others")
Signed-off-by: Thomas Fourier <fourier.thomas@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/mtd/nand/raw/rockchip-nand-controller.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/mtd/nand/raw/rockchip-nand-controller.c b/drivers/mtd/nand/raw/rockchip-nand-controller.c index 51c9cf9013dc..1b65b3aa6aa2 100644 --- a/drivers/mtd/nand/raw/rockchip-nand-controller.c +++ b/drivers/mtd/nand/raw/rockchip-nand-controller.c @@ -656,9 +656,16 @@ static int rk_nfc_write_page_hwecc(struct nand_chip *chip, const u8 *buf, dma_data = dma_map_single(nfc->dev, (void *)nfc->page_buf, mtd->writesize, DMA_TO_DEVICE); + if (dma_mapping_error(nfc->dev, dma_data)) + return -ENOMEM; + dma_oob = dma_map_single(nfc->dev, nfc->oob_buf, ecc->steps * oob_step, DMA_TO_DEVICE); + if (dma_mapping_error(nfc->dev, dma_oob)) { + dma_unmap_single(nfc->dev, dma_data, mtd->writesize, DMA_TO_DEVICE); + return -ENOMEM; + } reinit_completion(&nfc->done); writel(INT_DMA, nfc->regs + nfc->cfg->int_en_off); @@ -772,9 +779,17 @@ static int rk_nfc_read_page_hwecc(struct nand_chip *chip, u8 *buf, int oob_on, dma_data = dma_map_single(nfc->dev, nfc->page_buf, mtd->writesize, DMA_FROM_DEVICE); + if (dma_mapping_error(nfc->dev, dma_data)) + return -ENOMEM; + dma_oob = dma_map_single(nfc->dev, nfc->oob_buf, ecc->steps * oob_step, DMA_FROM_DEVICE); + if (dma_mapping_error(nfc->dev, dma_oob)) { + dma_unmap_single(nfc->dev, dma_data, mtd->writesize, + DMA_FROM_DEVICE); + return -ENOMEM; + } /* * The first blocks (4, 8 or 16 depending on the device) |