linux-kernel - Re: [PATCH] iommu/dma: add missing support for DMA_ATTR_MMIO for dma_iova

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Message-ID: <0d195d46-c409-484e-a3c8-1dac0ecc376f@samsung.com>
Date: Tue, 25 Nov 2025 13:20:23 +0100
From: Marek Szyprowski <m.szyprowski@...sung.com>
To: Leon Romanovsky <leon@...nel.org>
Cc: iommu@...ts.linux.dev, linux-kernel@...r.kernel.org, Robin Murphy
	<robin.murphy@....com>, Joerg Roedel <joro@...tes.org>, Will Deacon
	<will@...nel.org>, Jason Gunthorpe <jgg@...pe.ca>
Subject: Re: [PATCH] iommu/dma: add missing support for DMA_ATTR_MMIO for
 dma_iova_unlink()

On 24.11.2025 18:26, Leon Romanovsky wrote:
> On Mon, Nov 24, 2025 at 06:09:55PM +0100, Marek Szyprowski wrote:
>> Commit c288d657dd51 added support for DMA_ATTR_MMIO attribute in the
>> dma_iova_link() code path, but missed that the CPU cache is being also
>> touched in the dma_iova_unlink() path. Fix this.
>>
>> Fixes: c288d657dd51 ("iommu/dma: implement DMA_ATTR_MMIO for dma_iova_link().")
>> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
>> ---
>>   drivers/iommu/dma-iommu.c | 5 +++--
>>   1 file changed, 3 insertions(+), 2 deletions(-)
> Reviewed-by: Leon Romanovsky <leon@...nel.org>

Applied to dma-mapping-fixes.

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