* Limit is 0xFF EOP entries (= 0x7F8 dwords). CP will not submit
* more than (EOP entry count - 1) so a queue size of 0x800 dwords
* is safe, giving a maximum field value of 0xA.
+ *
+ * Also, do calculation only if EOP is used (size > 0), otherwise
+ * the order_base_2 calculation provides incorrect result.
+ *
*/
- m->cp_hqd_eop_control = min(0xA,
- order_base_2(q->eop_ring_buffer_size / 4) - 1);
+ m->cp_hqd_eop_control = q->eop_ring_buffer_size ?
+ min(0xA, order_base_2(q->eop_ring_buffer_size / 4) - 1) : 0;
+
m->cp_hqd_eop_base_addr_lo =
lower_32_bits(q->eop_ring_buffer_address >> 8);
m->cp_hqd_eop_base_addr_hi =