+/*

quoted

+ * This function will parse recommended active subregion information in
sense
+ * data field of response UPIU with SAM_STAT_GOOD state.
+ */
+void ufshpb_rsp_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
+{
+       struct ufshpb_lu *hpb;
+       struct scsi_device *sdev;
+       struct utp_hpb_rsp *rsp_field = &lrbp->ucd_rsp_ptr->hr;
+       int data_seg_len;
+       bool found = false;
+
+       __shost_for_each_device(sdev, hba->host) {
+               hpb = ufshpb_get_hpb_data(sdev);
+
+               if (!hpb)
+                       continue;
+
+               if (rsp_field->lun == hpb->lun) {
+                       found = true;
+                       break;

This piece of code looks awkward, although it is probably working.
Why not just having a reference to the hpb luns, e.g. something like:
struct ufshpb_lu *hpb_luns[8] in struct ufs_hba.
Less elegant - but much more effective than iterating the scsi host on every completion interrupt.

How about checking (cmd->lun == rsp->lun) before the iteration?
Major case will be have same lun. And, it is hard to add struct ufshpb_lu *hpb_luns[128]
in struct ufs_hba, because LUN can be upto 127.

Thanks,
Daejun