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Date:   Wed, 10 Feb 2021 08:37:59 +0100
From:   Christoph Hellwig <hch@lst.de>
To:     Filippo Sironi <sironi@amazon.de>
Cc:     serebrin@amazon.com, dwmw@amazon.co.uk, benh@amazon.com,
        kbusch@kernel.org, axboe@fb.com, hch@lst.de, sagi@grimberg.me,
        linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] nvme: Add 48-bit DMA address quirk for Amazon NVMe
 controllers
Message-ID: <20210210073759.GA23269@lst.de>
References: <20210203094338.19473-1-sironi@amazon.de> <20210210003942.25700-1-sironi@amazon.de>
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On Wed, Feb 10, 2021 at 01:39:42AM +0100, Filippo Sironi wrote:
> Amazon NVMe controllers do not support 64-bit DMA addresses; they are
> limited to 48-bit DMA addresses.  Let's add a quirk to ensure that we
> make use of 48-bit DMA addresses to avoid misbehavior.

This should probably say some, and mention that they do not follow
the spec.  But I can fix this up when applying the patch.