+       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?

+               return;
+       }