Re: [PATCH v2] scsi: target: Allow FUA if no write cache enabled

From: Martin K. Petersen

Date: Thu Apr 30 2026 - 11:44:05 EST



Stuart,

> Without this patch, accesses with FUA set will be rejected, even
> though they always go directly to the media when there's no write
> cache.

The spec allows this. However, ...

> This is needed because EDK2 FAT filesystem code sets the FUA bit when
> writing, regardless of whether the device advertises support of
> DPOFUA.

^^^ that is clearly a spec violation. What is being done to address this
issue?

Also, wrt. the patch itself, please see:

https://sashiko.dev/#/patchset/20260428203938.9738-1-stuart.w.hayes%40gmail.com

--
Martin K. Petersen