[PATCH] nvme-pci: 512 byte aligned dma pool segment quirk

[Christoph Hellwig]

On Tue, Nov 12, 2024 at 07:50:00PM +0000, Bob Beckett wrote:
> From: Robert Beckett <bob.beckett at collabora.com>
> 
> We initially put in a quick fix of limiting the queue depth to 1
> as experimentation showed that it fixed data corruption on 64GB
> steamdecks.
> 
> After further experimentation, it appears that the corruption
> is fixed by aligning the small dma pool segments to 512 bytes.
> Testing via desync image verification shows that it now passes
> thousands of verification loops, where previously
> it never managed above 7.

As suggested before, instead of changing the pool size please just
always use the large pool for this device.