On 2/3/21 10:51 AM, Christoph Hellwig wrote:

On Wed, Feb 03, 2021 at 10:43:38AM +0100, Filippo Sironi wrote:

quoted

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.

I don't disagree on the first part of your sentence, this is a big 
oversight.

On the other hand, those controllers are out there and are in use by a 
lot of customers.  We can keep relying on luck, hoping that customers 
don't run into troubles or we can merge a few lines of code :)



Amazon Development Center Germany GmbH
Krausenstr. 38
10117 Berlin
Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss
Eingetragen am Amtsgericht Charlottenburg unter HRB 149173 B
Sitz: Berlin
Ust-ID: DE 289 237 879


_______________________________________________
Linux-nvme mailing list
Linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme