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Message-Id: <20221024113022.943634207@linuxfoundation.org>
Date: Mon, 24 Oct 2022 13:26:46 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org,
Tudor Ambarus <tudor.ambarus@...rochip.com>,
Alexander Dahl <ada@...rsis.com>,
Peter Rosin <peda@...ntia.se>,
Boris Brezillon <boris.brezillon@...labora.com>,
Miquel Raynal <miquel.raynal@...tlin.com>
Subject: [PATCH 5.10 009/390] mtd: rawnand: atmel: Unmap streaming DMA mappings
From: Tudor Ambarus <tudor.ambarus@...rochip.com>
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@axentia.se/
Cc: stable@...r.kernel.org
Fixes: f88fc122cc34 ("mtd: nand: Cleanup/rework the atmel_nand driver")
Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>
Acked-by: Alexander Dahl <ada@...rsis.com>
Reported-by: Peter Rosin <peda@...ntia.se>
Tested-by: Alexander Dahl <ada@...rsis.com>
Reviewed-by: Boris Brezillon <boris.brezillon@...labora.com>
Tested-by: Peter Rosin <peda@...ntia.se>
Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
Link: https://lore.kernel.org/linux-mtd/20220728074014.145406-1-tudor.ambarus@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
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;
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