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Date:   Wed, 4 Sep 2019 05:17:22 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     Thomas =?iso-8859-1?Q?Hellstr=F6m_=28VMware=29?= 
        <thomas_os@shipmail.org>
Cc:     Christoph Hellwig <hch@infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: dma api errors with swiotlb
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A call to dma_max_mapping_size() to limit the maximum I/O size solves
that problem.  With the latest kernel that should actually be done
automatically by the SCSI midlayer for you.