[PATCH] nvme: revert the cross-controller atomic write size validation

[Hannes Reinecke]

On 7/14/25 16:44, Christoph Hellwig wrote:
> This was originally added by commit 8695f060a029 ("nvme: all namespaces
> in a subsystem must adhere to a common atomic write size") to check
> the all controllers in a subsystem report the same atomic write size,
> but the check wasn't quite correct and caused problems for devices
> with multiple namespaces that report different LBA sizes.  Commit
> f46d273449ba ("nvme: fix atomic write size validation") tried to fix
> this, but then caused problems for namespace rediscovery after a
> format with an LBA size change that changes the AWUPF value.
> 
> This drop the validation and essentially revers those two commits while
> keeping the cleanup that went in between the two.  We'll need to figure
> out how to properly check for the mouse trap that nvme left us, but for
> now revert the check to keep devices working for users who couldn't care
> less about the atomic write feature.
> 
> Fixes: 8695f060a029 ("nvme: all namespaces in a subsystem must adhere to a common atomic write size")
> Fixes: f46d273449ba ("nvme: fix atomic write size validation")
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
>   drivers/nvme/host/core.c | 9 ---------
>   1 file changed, 9 deletions(-)
> 
Yes, please. It had been a annoying me for quite some time,
glad to see it go.

Reviewed-by: Hannes Reinecke <hare at suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                  Kernel Storage Architect
hare at suse.de                                +49 911 74053 688
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