Patch "mtd: rawnand: atmel: Unmap streaming DMA mappings" has been added to the 6.0-stable tree

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This is a note to let you know that I've just added the patch titled

    mtd: rawnand: atmel: Unmap streaming DMA mappings

to the 6.0-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mtd-rawnand-atmel-unmap-streaming-dma-mappings.patch
and it can be found in the queue-6.0 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 1161703c9bd664da5e3b2eb1a3bb40c210e026ea Mon Sep 17 00:00:00 2001
From: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>
Date: Thu, 28 Jul 2022 10:40:14 +0300
Subject: mtd: rawnand: atmel: Unmap streaming DMA mappings

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;
 


Patches currently in stable-queue which might be from tudor.ambarus@xxxxxxxxxxxxx are

queue-6.0/mtd-rawnand-atmel-unmap-streaming-dma-mappings.patch



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