netdev - Re: [REGRESSION] Recent swiotlb DMA_FROM_DEVICE fixes break ath9k-based AP

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Message-ID: <12981608.uLZWGnKmhe@natalenko.name>
Date:   Fri, 25 Mar 2022 20:26:20 +0100
From:   Oleksandr Natalenko <oleksandr@...alenko.name>
To:     Maxime Bizon <mbizon@...ebox.fr>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Toke Høiland-Jørgensen <toke@...e.dk>,
        Robin Murphy <robin.murphy@....com>,
        Christoph Hellwig <hch@....de>,
        Halil Pasic <pasic@...ux.ibm.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Olha Cherevyk <olha.cherevyk@...il.com>,
        iommu <iommu@...ts.linux-foundation.org>,
        linux-wireless <linux-wireless@...r.kernel.org>,
        Netdev <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable <stable@...r.kernel.org>
Subject: Re: [REGRESSION] Recent swiotlb DMA_FROM_DEVICE fixes break ath9k-based AP

On pátek 25. března 2022 19:30:21 CET Linus Torvalds wrote:
> The reason the ath9k issue was found quickly
> is very likely *NOT* because ath9k is the only thing affected. No,
> it's because ath9k is relatively common.

Indeed. But having a wife who complains about non-working Wi-Fi printer definitely helps in finding the issue too.

-- 
Oleksandr Natalenko (post-factum)