-/* This files gather functions specifics to: r300,r350,rv350,rv370,rv380 */
+/* This files gather functions specifics to: r300,r350,rv350,rv370,rv380
+ *
+ * GPU Errata:
+ * - HOST_PATH_CNTL: r300 family seems to dislike write to HOST_PATH_CNTL
+ * using MMIO to flush host path read cache, this lead to HARDLOCKUP.
+ * However, scheduling such write to the ring seems harmless, i suspect
+ * the CP read collide with the flush somehow, or maybe the MC, hard to
+ * tell. (Jerome Glisse)
+ */