Re: [RESEND][PATCH] drivers: of: of_reserved_mem: fixup the CMA alignment not to affect dma-coherent

From: Marek Szyprowski
Date: Fri May 27 2016 - 03:56:59 EST


On 2016-05-25 16:38, Rob Herring wrote:
On Tue, May 24, 2016 at 11:29 PM, Jaewon Kim <> wrote:
From: Jaewon <>

There was an alignment mismatch issue for CMA and it was fixed by
commit 1cc8e3458b51 ("drivers: of: of_reserved_mem: fixup the alignment with CMA setup").
However the way of the commit considers not only dma-contiguous(CMA) but also
dma-coherent which has no that requirement.

This patch checks more to distinguish dma-contiguous(CMA) from dma-coherent.

Signed-off-by: Jaewon Kim <>
I suppose this needs to go to stable? If so, adding the stable tag and
kernel version would be nice so I don't have to.

drivers/of/of_reserved_mem.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
I'm looking for an ack from Marek on this.

Acked-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>

Best regards
Marek Szyprowski, PhD
Samsung R&D Institute Poland