Re: [PATCH v4 03/16] block: sed-opal: unify space check in add_token_*

[David Kozub]

On Mon, 4 Feb 2019, Christoph Hellwig wrote:

> On Fri, Feb 01, 2019 at 09:50:10PM +0100, David Kozub wrote:
> > From: Jonas Rabenstein <jonas.rabenstein@xxxxxxxxxxxxxxxxxxxxxxx>
> >
> > All add_token_* functions have a common set of conditions that have to
> > be checked. Use a common function for those checks in order to avoid
> > different behaviour as well as code duplication.
> >
> > Co-authored-by: David Kozub <zub@xxxxxxxxxxxxxxxxxx>
> > Signed-off-by: Jonas Rabenstein <jonas.rabenstein@xxxxxxxxxxxxxxxxxxxxxxx>
> > Signed-off-by: David Kozub <zub@xxxxxxxxxxxxxxxxxx>
> > Reviewed-by: Scott Bauer <sbauer@xxxxxxxxxxxxxx>
> > ---
> >  block/sed-opal.c | 30 +++++++++++++++++++++---------
> >  1 file changed, 21 insertions(+), 9 deletions(-)
> >
> > diff --git a/block/sed-opal.c b/block/sed-opal.c
> > index 5c123a5b4ab1..980705681806 100644
> > --- a/block/sed-opal.c
> > +++ b/block/sed-opal.c
> > @@ -510,15 +510,29 @@ static int opal_discovery0(struct opal_dev *dev, void *data)
> >  	return opal_discovery0_end(dev);
> >  }
> >
> > -static void add_token_u8(int *err, struct opal_dev *cmd, u8 tok)
> > +static size_t remaining_size(struct opal_dev *cmd)
> > +{
> > +	return IO_BUFFER_LENGTH - cmd->pos;
> > +}
>
> This function seem a little pointless to me, at least as of this patch
> where it only has a single user just below.

It is eventually used for the second time in 11/16 block: sed-opal: ioctl 
for writing to shadow mbr.

If you feel strongly about this I can exclude it from this commit and 
introduce it in 11/16 (where it then will called from here and from 
write_shadow_mbr).

Best regards,
David