Re: [PATCH 5/7] bio-integrity: add bio_integrity_setup helper

[Christoph Hellwig]

On Mon, Apr 03, 2017 at 11:23:30AM +0400, Dmitry Monakhov wrote:
> Currently all integrity prep hooks are open-coded, and if prepare fails
> we ignore it's code and fail bio with EIO. Let's return real error to
> upper layer, so later caller may react accordingly. For example retry in
> case of ENOMEM.

bio_integrity_enabled and bio_integrity_prep seem to be unused outside
of  bio_integrity_setup, so they can be removed / folded into
bio_integrity_setup.  Which at this point might just keep the
bio_integrity_prep name to fit into the blocking traditions :)

Also please update Documentation/block/data-integrity.txt for your
changes and add a kerneldoc comment for the new function.