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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Fri, 25 Mar 2022 12:27:43 -0700
Message-ID: <CAHk-=wghZ3c4G2xjy3pR7txmdCnau21z_tidjfU2w0HO-90=sw@mail.gmail.com>
Subject: Re: [REGRESSION] Recent swiotlb DMA_FROM_DEVICE fixes break
 ath9k-based AP
To:     Oleksandr Natalenko <oleksandr@natalenko.name>
Cc:     Maxime Bizon <mbizon@freebox.fr>,
        =?UTF-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= <toke@toke.dk>,
        Robin Murphy <robin.murphy@arm.com>,
        Christoph Hellwig <hch@lst.de>,
        Halil Pasic <pasic@linux.ibm.com>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Kalle Valo <kvalo@kernel.org>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Olha Cherevyk <olha.cherevyk@gmail.com>,
        iommu <iommu@lists.linux-foundation.org>,
        linux-wireless <linux-wireless@vger.kernel.org>,
        Netdev <netdev@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable <stable@vger.kernel.org>
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On Fri, Mar 25, 2022 at 12:26 PM Oleksandr Natalenko
<oleksandr@natalenko.name> wrote:
>
> On p=C3=A1tek 25. b=C5=99ezna 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 d=
efinitely helps in finding the issue too.

Well, maybe we should credit her in the eventual resolution (whatever
it ends up being).

Although probably not using that exact wording.

        Linus