diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 3dfedc8..7fbb6f9 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -161,7 +161,6 @@ struct nvme_queue {
 	u16 cq_head;
 	u16 qid;
 	u8 cq_phase;
-	u8 cqe_seen;
 	u32 *dbbuf_sq_db;
 	u32 *dbbuf_cq_db;
 	u32 *dbbuf_sq_ei;
@@ -932,9 +931,9 @@ static inline void nvme_ring_cq_doorbell(struct nvme_queue *nvmeq)
 	}
 }
 
-static inline void nvme_handle_cqe(struct nvme_queue *nvmeq,
-		struct nvme_completion *cqe)
+static inline void nvme_handle_cqe(struct nvme_queue *nvmeq, u16 idx)
 {
+	volatile struct nvme_completion *cqe = &nvmeq->cqes[idx];
 	struct request *req;
 
 	if (unlikely(cqe->command_id >= nvmeq->q_depth)) {
@@ -957,50 +956,58 @@ static inline void nvme_handle_cqe(struct nvme_queue *nvmeq,
 		return;
 	}
 
-	nvmeq->cqe_seen = 1;
 	req = blk_mq_tag_to_rq(*nvmeq->tags, cqe->command_id);
 	nvme_end_request(req, cqe->status, cqe->result);
 }
 
-static inline bool nvme_read_cqe(struct nvme_queue *nvmeq,
-		struct nvme_completion *cqe)
+static void nvme_complete_cqes(struct nvme_queue *nvmeq, u16 start, u16 end)
 {
-	if (nvme_cqe_pending(nvmeq)) {
-		*cqe = nvmeq->cqes[nvmeq->cq_head];
-
-		if (++nvmeq->cq_head == nvmeq->q_depth) {
-			nvmeq->cq_head = 0;
-			nvmeq->cq_phase = !nvmeq->cq_phase;
-		}
-		return true;
+	while (start != end) {
+		nvme_handle_cqe(nvmeq, start);
+		if (++start == nvmeq->q_depth)
+			start = 0;
 	}
-	return false;
 }
 
-static void nvme_process_cq(struct nvme_queue *nvmeq)
+static inline void nvme_update_cq_head(struct nvme_queue *nvmeq)
 {
-	struct nvme_completion cqe;
-	int consumed = 0;
-
-	while (nvme_read_cqe(nvmeq, &cqe)) {
-		nvme_handle_cqe(nvmeq, &cqe);
-		consumed++;
+	if (++nvmeq->cq_head == nvmeq->q_depth) {
+		nvmeq->cq_head = 0;
+		nvmeq->cq_phase = !nvmeq->cq_phase;
 	}
+}
 
-	if (consumed)
+static inline bool nvme_process_cq(struct nvme_queue *nvmeq, u16 *start,
+		u16 *end, int tag)
+{
+	bool found = false;
+
+	*start = nvmeq->cq_head;
+	while (!found && nvme_cqe_pending(nvmeq)) {
+		if (nvmeq->cqes[nvmeq->cq_head].command_id == tag)
+			found = true;
+		nvme_update_cq_head(nvmeq);
+	}
+	*end = nvmeq->cq_head;
+
+	if (*start != *end)
 		nvme_ring_cq_doorbell(nvmeq);
+	return found;
 }
 
 static irqreturn_t nvme_irq(int irq, void *data)
 {
-	irqreturn_t result;
 	struct nvme_queue *nvmeq = data;
+	u16 start, end;
+
 	spin_lock(&nvmeq->q_lock);
-	nvme_process_cq(nvmeq);
-	result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE;
-	nvmeq->cqe_seen = 0;
+	nvme_process_cq(nvmeq, &start, &end, -1);
 	spin_unlock(&nvmeq->q_lock);
-	return result;
+
+	if (start == end)
+		return IRQ_NONE;
+	nvme_complete_cqes(nvmeq, start, end);
+	return IRQ_HANDLED;
 }
 
 static irqreturn_t nvme_irq_check(int irq, void *data)
@@ -1013,27 +1020,17 @@ static irqreturn_t nvme_irq_check(int irq, void *data)
 
 static int __nvme_poll(struct nvme_queue *nvmeq, unsigned int tag)
 {
-	struct nvme_completion cqe;
-	int found = 0, consumed = 0;
+	u16 start, end;
+	bool found;
 
 	if (!nvme_cqe_pending(nvmeq))
 		return 0;
 
 	spin_lock_irq(&nvmeq->q_lock);
-	while (nvme_read_cqe(nvmeq, &cqe)) {
-		nvme_handle_cqe(nvmeq, &cqe);
-		consumed++;
-
-		if (tag == cqe.command_id) {
-			found = 1;
-			break;
-		}
-       }
-
-	if (consumed)
-		nvme_ring_cq_doorbell(nvmeq);
+	found = nvme_process_cq(nvmeq, &start, &end, tag);
 	spin_unlock_irq(&nvmeq->q_lock);
 
+	nvme_complete_cqes(nvmeq, start, end);
 	return found;
 }
 
@@ -1340,6 +1337,7 @@ static int nvme_suspend_queue(struct nvme_queue *nvmeq)
 static void nvme_disable_admin_queue(struct nvme_dev *dev, bool shutdown)
 {
 	struct nvme_queue *nvmeq = &dev->queues[0];
+	u16 start, end;
 
 	if (shutdown)
 		nvme_shutdown_ctrl(&dev->ctrl);
@@ -1347,8 +1345,10 @@ static void nvme_disable_admin_queue(struct nvme_dev *dev, bool shutdown)
 		nvme_disable_ctrl(&dev->ctrl, dev->ctrl.cap);
 
 	spin_lock_irq(&nvmeq->q_lock);
-	nvme_process_cq(nvmeq);
+	nvme_process_cq(nvmeq, &start, &end, -1);
 	spin_unlock_irq(&nvmeq->q_lock);
+
+	nvme_complete_cqes(nvmeq, start, end);
 }
 
 static int nvme_cmb_qdepth(struct nvme_dev *dev, int nr_io_queues,
@@ -1995,6 +1995,7 @@ static void nvme_del_queue_end(struct request *req, blk_status_t error)
 static void nvme_del_cq_end(struct request *req, blk_status_t error)
 {
 	struct nvme_queue *nvmeq = req->end_io_data;
+	u16 start, end;
 
 	if (!error) {
 		unsigned long flags;
@@ -2006,8 +2007,10 @@ static void nvme_del_cq_end(struct request *req, blk_status_t error)
 		 */
 		spin_lock_irqsave_nested(&nvmeq->q_lock, flags,
 					SINGLE_DEPTH_NESTING);
-		nvme_process_cq(nvmeq);
+		nvme_process_cq(nvmeq, &start, &end, -1);
 		spin_unlock_irqrestore(&nvmeq->q_lock, flags);
+
+		nvme_complete_cqes(nvmeq, start, end);
 	}
 
 	nvme_del_queue_end(req, error);