linux-kernel - Re: Bug 205201 - overflow of DMA mask and bus mask

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Message-ID: <20191113110207.GA7280@lst.de>
Date:   Wed, 13 Nov 2019 12:02:07 +0100
From:   Christoph Hellwig <hch@....de>
To:     Christian Zigotzky <chzigotzky@...osoft.de>
Cc:     Christoph Hellwig <hch@....de>, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        iommu@...ts.linux-foundation.org,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        paulus@...ba.org, darren@...vens-zone.net,
        "contact@...on.com" <contact@...on.com>, rtd2@...a.co.nz,
        mad skateman <madskateman@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        nsaenzjulienne@...e.de
Subject: Re: Bug 205201 - overflow of DMA mask and bus mask

Interesting.  Give me some time to come up with a real fix, as drivers
really should not mess with GFP flags for these allocations, and even
if they did swiotlb is supposed to take care of any resulting problems.