linux-kernel - Re: [PATCH] dma-direct: use the correct size for dma_set

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Message-ID: <20220623054352.GA12543@lst.de>
Date:   Thu, 23 Jun 2022 07:43:52 +0200
From:   Christoph Hellwig <hch@....de>
To:     Dexuan Cui <decui@...rosoft.com>
Cc:     hch@....de, m.szyprowski@...sung.com, robin.murphy@....com,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        linux-hyperv@...r.kernel.org, mikelley@...rosoft.com,
        Andrea.Parri@...rosoft.com, Tianyu.Lan@...rosoft.com
Subject: Re: [PATCH] dma-direct: use the correct size for
 dma_set_encrypted()

On Wed, Jun 22, 2022 at 12:14:24PM -0700, Dexuan Cui wrote:
> The third parameter of dma_set_encrypted() is a size in bytes rather than
> the number of pages.
> 
> Fixes: 4d0564785bb0 ("dma-direct: factor out dma_set_{de,en}crypted helpers")
> Signed-off-by: Dexuan Cui <decui@...rosoft.com>

see:

commit 4a37f3dd9a83186cb88d44808ab35b78375082c9 (tag: dma-mapping-5.19-2022-05-25)
Author: Robin Murphy <robin.murphy@....com>
Date:   Fri May 20 18:10:13 2022 +0100

    dma-direct: don't over-decrypt memory