linux-kernel - Re: dma api errors with swiotlb

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Message-ID: <20190904121722.GA15601@infradead.org>
Date:   Wed, 4 Sep 2019 05:17:22 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Thomas Hellström (VMware) 
        <thomas_os@...pmail.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: dma api errors with swiotlb

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.