diff --git a/drivers/gpu/drm/xe/xe_pt.c b/drivers/gpu/drm/xe/xe_pt.c
index 670bc2206fea..781b956cd2bc 100644
--- a/drivers/gpu/drm/xe/xe_pt.c
+++ b/drivers/gpu/drm/xe/xe_pt.c
@@ -1026,12 +1026,22 @@ xe_vm_populate_pgtable(struct xe_migrate_pt_update *pt_update, struct xe_tile *t
 	u64 *ptr = data;
 	u32 i;
 
+	/*
+	 * @qword_ofs is the absolute entry offset within the page table, while
+	 * @ptes is indexed relative to @update->ofs (its first entry). The GPU
+	 * path (write_pgtable) splits a single update into MAX_PTE_PER_SDI-sized
+	 * chunks, calling this with an advancing @qword_ofs but a fresh @data
+	 * pointer per chunk, so translate back into a @ptes index rather than
+	 * assuming the chunk starts at ptes[0].
+	 */
 	for (i = 0; i < num_qwords; i++) {
+		u32 idx = qword_ofs - update->ofs + i;
+
 		if (map)
 			xe_map_wr(tile_to_xe(tile), map, (qword_ofs + i) *
-				  sizeof(u64), u64, ptes[i].pte);
+				  sizeof(u64), u64, ptes[idx].pte);
 		else
-			ptr[i] = ptes[i].pte;
+			ptr[i] = ptes[idx].pte;
 	}
 }