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authorTudor Ambarus <tudor.ambarus@microchip.com>2022-07-28 10:40:14 +0300
committerMiquel Raynal <miquel.raynal@bootlin.com>2022-09-21 11:38:46 +0300
commit1161703c9bd664da5e3b2eb1a3bb40c210e026ea (patch)
treef6a2599d990da5f9228380230a4f52c21454873c /drivers/mtd
parent3e4ad3212cf22687410b1e8f4e68feec50646113 (diff)
downloadlinux-1161703c9bd664da5e3b2eb1a3bb40c210e026ea.tar.xz
mtd: rawnand: atmel: Unmap streaming DMA mappings
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@axentia.se/ Cc: stable@vger.kernel.org Fixes: f88fc122cc34 ("mtd: nand: Cleanup/rework the atmel_nand driver") Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Acked-by: Alexander Dahl <ada@thorsis.com> Reported-by: Peter Rosin <peda@axentia.se> Tested-by: Alexander Dahl <ada@thorsis.com> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com> Tested-by: Peter Rosin <peda@axentia.se> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20220728074014.145406-1-tudor.ambarus@microchip.com
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/raw/atmel/nand-controller.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/raw/atmel/nand-controller.c
index c9ac3baf68c0..41c6bd6e2d72 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;