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Date:   Mon, 28 Mar 2022 11:57:30 +0200
From:   Johannes Berg <>
To:     Halil Pasic <>
Cc:     Linus Torvalds <>,
        Maxime Bizon <>,
        Toke Høiland-Jørgensen <>,
        Robin Murphy <>,
        Christoph Hellwig <>,
        Oleksandr Natalenko <>,
        Marek Szyprowski <>,
        Kalle Valo <>,
        "David S. Miller" <>,
        Jakub Kicinski <>,
        Paolo Abeni <>,
        Olha Cherevyk <>,
        iommu <>,
        linux-wireless <>,
        Netdev <>,
        Linux Kernel Mailing List <>,
        Greg Kroah-Hartman <>,
        stable <>
Subject: Re: [REGRESSION] Recent swiotlb DMA_FROM_DEVICE fixes break
 ath9k-based AP

On Mon, 2022-03-28 at 11:50 +0200, Johannes Berg wrote:
> No I worded that badly - the direction isn't useless, but thinking of it
> in terms of a buffer property rather than data movement is inaccurate.
> So then if we need something else to indicate how data was expected to
> be moved, the direction argument becomes useless, since it's not a
> buffer property but rather a temporal thing on a specific place that
> expected certain data movement.

Yeah, umm. I should've read the whole thread of the weekend first, sorry
for the noise.


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