diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c
index 9a8a43b..675ee72 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -1427,11 +1427,6 @@ int ena_com_create_io_cq(struct ena_com_dev *ena_dev,
 	io_cq->unmask_reg = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
 		cmd_completion.cq_interrupt_unmask_register_offset);
 
-	if (cmd_completion.cq_head_db_register_offset)
-		io_cq->cq_head_db_reg =
-			(u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
-			cmd_completion.cq_head_db_register_offset);
-
 	if (cmd_completion.numa_node_register_offset)
 		io_cq->numa_node_cfg_reg =
 			(u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
diff --git a/drivers/net/ethernet/amazon/ena/ena_com.h b/drivers/net/ethernet/amazon/ena/ena_com.h
index f3176fc..8f90c3c 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.h
+++ b/drivers/net/ethernet/amazon/ena/ena_com.h
@@ -109,8 +109,6 @@ struct ena_com_io_cq {
 	/* Interrupt unmask register */
 	u32 __iomem *unmask_reg;
 
-	/* The completion queue head doorbell register */
-	u32 __iomem *cq_head_db_reg;
 
 	/* numa configuration register (for TPH) */
 	u32 __iomem *numa_node_cfg_reg;
@@ -118,7 +116,7 @@ struct ena_com_io_cq {
 	/* The value to write to the above register to unmask
 	 * the interrupt of this queue
 	 */
-	u32 msix_vector;
+	u32 msix_vector ____cacheline_aligned;
 
 	enum queue_direction direction;
 
@@ -134,7 +132,6 @@ struct ena_com_io_cq {
 	/* Device queue index */
 	u16 idx;
 	u16 head;
-	u16 last_head_update;
 	u8 phase;
 	u8 cdesc_entry_size_in_bytes;
 
diff --git a/drivers/net/ethernet/amazon/ena/ena_eth_com.h b/drivers/net/ethernet/amazon/ena/ena_eth_com.h
index 372b259..4d65d82 100644
--- a/drivers/net/ethernet/amazon/ena/ena_eth_com.h
+++ b/drivers/net/ethernet/amazon/ena/ena_eth_com.h
@@ -8,8 +8,6 @@
 
 #include "ena_com.h"
 
-/* head update threshold in units of (queue size / ENA_COMP_HEAD_THRESH) */
-#define ENA_COMP_HEAD_THRESH 4
 /* we allow 2 DMA descriptors per LLQ entry */
 #define ENA_LLQ_ENTRY_DESC_CHUNK_SIZE	(2 * sizeof(struct ena_eth_io_tx_desc))
 #define ENA_LLQ_HEADER		(128UL - ENA_LLQ_ENTRY_DESC_CHUNK_SIZE)
@@ -172,28 +170,6 @@ static inline int ena_com_write_sq_doorbell(struct ena_com_io_sq *io_sq)
 	return 0;
 }
 
-static inline int ena_com_update_dev_comp_head(struct ena_com_io_cq *io_cq)
-{
-	u16 unreported_comp, head;
-	bool need_update;
-
-	if (unlikely(io_cq->cq_head_db_reg)) {
-		head = io_cq->head;
-		unreported_comp = head - io_cq->last_head_update;
-		need_update = unreported_comp > (io_cq->q_depth / ENA_COMP_HEAD_THRESH);
-
-		if (unlikely(need_update)) {
-			netdev_dbg(ena_com_io_cq_to_ena_dev(io_cq)->net_device,
-				   "Write completion queue doorbell for queue %d: head: %d\n",
-				   io_cq->qid, head);
-			writel(head, io_cq->cq_head_db_reg);
-			io_cq->last_head_update = head;
-		}
-	}
-
-	return 0;
-}
-
 static inline void ena_com_update_numa_node(struct ena_com_io_cq *io_cq,
 					    u8 numa_node)
 {
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 0b7f94f..cd75e5a 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -856,7 +856,6 @@ static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
 
 	tx_ring->next_to_clean = next_to_clean;
 	ena_com_comp_ack(tx_ring->ena_com_io_sq, total_done);
-	ena_com_update_dev_comp_head(tx_ring->ena_com_io_cq);
 
 	netdev_tx_completed_queue(txq, tx_pkts, tx_bytes);
 
@@ -1303,10 +1302,8 @@ static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
 		      ENA_RX_REFILL_THRESH_PACKET);
 
 	/* Optimization, try to batch new rx buffers */
-	if (refill_required > refill_threshold) {
-		ena_com_update_dev_comp_head(rx_ring->ena_com_io_cq);
+	if (refill_required > refill_threshold)
 		ena_refill_rx_bufs(rx_ring, refill_required);
-	}
 
 	if (xdp_flags & ENA_XDP_REDIRECT)
 		xdp_do_flush();
diff --git a/drivers/net/ethernet/amazon/ena/ena_xdp.c b/drivers/net/ethernet/amazon/ena/ena_xdp.c
index fc1c4ef..337c435 100644
--- a/drivers/net/ethernet/amazon/ena/ena_xdp.c
+++ b/drivers/net/ethernet/amazon/ena/ena_xdp.c
@@ -412,7 +412,6 @@ static int ena_clean_xdp_irq(struct ena_ring *tx_ring, u32 budget)
 
 	tx_ring->next_to_clean = next_to_clean;
 	ena_com_comp_ack(tx_ring->ena_com_io_sq, total_done);
-	ena_com_update_dev_comp_head(tx_ring->ena_com_io_cq);
 
 	netif_dbg(tx_ring->adapter, tx_done, tx_ring->netdev,
 		  "tx_poll: q %d done. total pkts: %d\n",
