Re: [PATCH] nvme: Add 48-bit DMA address quirk

From: Christoph Hellwig
Date: Wed Feb 03 2021 - 04:52:54 EST


On Wed, Feb 03, 2021 at 10:43:38AM +0100, Filippo Sironi wrote:
> Certain NVMe controllers don't support 64-bit DMA addresses. Instead,
> they are limited to 48-bit DMA addresses. Let's add a quirk to use them
> properly.

WTF? This is such a grave NVMe spec compiance bug that I do not think
we should support this buggy mess in Linux.