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Subject[PATCH] mtd: rawnand: atmel: Unmap streaming DMA mappings
Date
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.

Cc: stable@vger.kernel.org
Fixes: f88fc122cc34 ("mtd: nand: Cleanup/rework the atmel_nand driver")
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
drivers/mtd/nand/raw/atmel/nand-controller.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/raw/atmel/nand-controller.c
index 6ef14442c71a..330d2dafdd2d 100644
--- 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(struct atmel_nand_controller *nc,

dma_async_issue_pending(nc->dmac);
wait_for_completion(&finished);
+ dma_unmap_single(nc->dev, buf_dma, len, dir);

return 0;

--
2.25.1
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