From: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx> commit 1161703c9bd664da5e3b2eb1a3bb40c210e026ea upstream. Every dma_map_single() call should have its dma_unmap_single() counterpart, because the DMA address space is a shared resource and one could render the machine unusable by consuming all DMA addresses. Link: https://lore.kernel.org/lkml/13c6c9a2-6db5-c3bf-349b-4c127ad3496a@xxxxxxxxxx/ Cc: stable@xxxxxxxxxxxxxxx Fixes: f88fc122cc34 ("mtd: nand: Cleanup/rework the atmel_nand driver") Signed-off-by: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx> Acked-by: Alexander Dahl <ada@xxxxxxxxxxx> Reported-by: Peter Rosin <peda@xxxxxxxxxx> Tested-by: Alexander Dahl <ada@xxxxxxxxxxx> Reviewed-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx> Tested-by: Peter Rosin <peda@xxxxxxxxxx> Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx> Link: https://lore.kernel.org/linux-mtd/20220728074014.145406-1-tudor.ambarus@xxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/mtd/nand/raw/atmel/nand-controller.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/mtd/nand/raw/atmel/nand-controller.c +++ b/drivers/mtd/nand/raw/atmel/nand-controller.c @@ -405,6 +405,7 @@ static int atmel_nand_dma_transfer(struc dma_async_issue_pending(nc->dmac); wait_for_completion(&finished); + dma_unmap_single(nc->dev, buf_dma, len, dir); return 0;
