Re: [PATCH v37 3/4] scsi: ufs: Prepare HPB read for cached sub-region

+	/*
+	 * If the region state is active, mctx must be allocated.
+	 * In this case, check whether the region is evicted or
+	 * mctx allcation fail.
+	 */
+	if (unlikely(!srgn->mctx)) {
+		dev_err(&hpb->sdev_ufs_lu->sdev_dev,
+			"no mctx in region %d subregion %d.\n",
+			srgn->rgn_idx, srgn->srgn_idx);
+		return true;
+	}
+
+	if ((srgn_offset + cnt) > bitmap_len)
+		bit_len = bitmap_len - srgn_offset;
+	else
+		bit_len = cnt;
+
+	if (find_next_bit(srgn->mctx->ppn_dirty, bitmap_len,
+			  srgn_offset) < bit_len + srgn_offset)
+		return true;
+

It seems unnecessary to search through bitmap_len
How about searching by transfer size?

if (find_next_bit(srgn->mctx->ppn_dirty,
              bit_len + srgn_offset, srgn_offset) < bit_len + srgn_offset)

Thanks
Yohan