RE: RE: [PATCH v22 3/4] scsi: ufs: Prepare HPB read for cached sub-region

[Daejun Park]

> > +       err = ufshpb_fill_ppn_from_page(hpb, srgn->mctx, srgn_offset, 1, &ppn);
> > +       spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
> > +       if (unlikely(err < 0)) {
> > +               /*
> > +                * In this case, the region state is active,
> > +                * but the ppn table is not allocated.
> > +                * Make sure that ppn table must be allocated on
> > +                * active state.
> > +                */
> > +               WARN_ON(true);
> > +               dev_err(hba->dev, "get ppn failed. err %d\n", err);
> Maybe just pr_warn instead of risking crashing the machine over that?

Why it crashing the machine? WARN_ON will just print kernel message.

Thanks,
Daejun