This is a note to let you know that I've just added the patch titled
ARM: dma-mapping: fix GFP_ATOMIC macro usage
to the 3.13-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:
arm-dma-mapping-fix-gfp_atomic-macro-usage.patch
and it can be found in the queue-3.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 10c8562f932d89c030083e15f9279971ed637136 Mon Sep 17 00:00:00 2001
From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Date: Thu, 16 Jan 2014 15:39:17 +0100
Subject: ARM: dma-mapping: fix GFP_ATOMIC macro usage
From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
commit 10c8562f932d89c030083e15f9279971ed637136 upstream.
GFP_ATOMIC is not a single gfp flag, but a macro which expands to the other
flags and LACK of __GFP_WAIT flag. To check if caller wanted to perform an
atomic allocation, the code must test __GFP_WAIT flag presence. This patch
fixes the issue introduced in v3.6-rc5
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mm/dma-mapping.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -1358,7 +1358,7 @@ static void *arm_iommu_alloc_attrs(struc
*handle = DMA_ERROR_CODE;
size = PAGE_ALIGN(size);
- if (gfp & GFP_ATOMIC)
+ if (!(gfp & __GFP_WAIT))
return __iommu_alloc_atomic(dev, size, handle);
/*
Patches currently in stable-queue which might be from m.szyprowski@xxxxxxxxxxx are
queue-3.13/arm-dma-mapping-fix-gfp_atomic-macro-usage.patch
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