diff --git a/drivers/accel/qaic/qaic.h b/drivers/accel/qaic/qaic.h
index 02561b6cecc6..2d7b3af09e28 100644
--- a/drivers/accel/qaic/qaic.h
+++ b/drivers/accel/qaic/qaic.h
@@ -91,6 +91,8 @@ struct dma_bridge_chan {
 	 * response queue's head and tail pointer of this DBC.
 	 */
 	void __iomem		*dbc_base;
+	/* Synchronizes access to Request queue's head and tail pointer */
+	struct mutex		req_lock;
 	/* Head of list where each node is a memory handle queued in request queue */
 	struct list_head	xfer_list;
 	/* Synchronizes DBC readers during cleanup */
diff --git a/drivers/accel/qaic/qaic_data.c b/drivers/accel/qaic/qaic_data.c
index 43aba57b48f0..265eeb4e156f 100644
--- a/drivers/accel/qaic/qaic_data.c
+++ b/drivers/accel/qaic/qaic_data.c
@@ -1357,13 +1357,17 @@ static int __qaic_execute_bo_ioctl(struct drm_device *dev, void *data, struct dr
 		goto release_ch_rcu;
 	}
 
+	ret = mutex_lock_interruptible(&dbc->req_lock);
+	if (ret)
+		goto release_ch_rcu;
+
 	head = readl(dbc->dbc_base + REQHP_OFF);
 	tail = readl(dbc->dbc_base + REQTP_OFF);
 
 	if (head == U32_MAX || tail == U32_MAX) {
 		/* PCI link error */
 		ret = -ENODEV;
-		goto release_ch_rcu;
+		goto unlock_req_lock;
 	}
 
 	queue_level = head <= tail ? tail - head : dbc->nelem - (head - tail);
@@ -1371,11 +1375,12 @@ static int __qaic_execute_bo_ioctl(struct drm_device *dev, void *data, struct dr
 	ret = send_bo_list_to_device(qdev, file_priv, exec, args->hdr.count, is_partial, dbc,
 				     head, &tail);
 	if (ret)
-		goto release_ch_rcu;
+		goto unlock_req_lock;
 
 	/* Finalize commit to hardware */
 	submit_ts = ktime_get_ns();
 	writel(tail, dbc->dbc_base + REQTP_OFF);
+	mutex_unlock(&dbc->req_lock);
 
 	update_profiling_data(file_priv, exec, args->hdr.count, is_partial, received_ts,
 			      submit_ts, queue_level);
@@ -1383,6 +1388,9 @@ static int __qaic_execute_bo_ioctl(struct drm_device *dev, void *data, struct dr
 	if (datapath_polling)
 		schedule_work(&dbc->poll_work);
 
+unlock_req_lock:
+	if (ret)
+		mutex_unlock(&dbc->req_lock);
 release_ch_rcu:
 	srcu_read_unlock(&dbc->ch_lock, rcu_id);
 unlock_dev_srcu:
diff --git a/drivers/accel/qaic/qaic_drv.c b/drivers/accel/qaic/qaic_drv.c
index 10e711c96a67..cb606c4bb851 100644
--- a/drivers/accel/qaic/qaic_drv.c
+++ b/drivers/accel/qaic/qaic_drv.c
@@ -422,6 +422,9 @@ static struct qaic_device *create_qdev(struct pci_dev *pdev, const struct pci_de
 			return NULL;
 		init_waitqueue_head(&qdev->dbc[i].dbc_release);
 		INIT_LIST_HEAD(&qdev->dbc[i].bo_lists);
+		ret = drmm_mutex_init(drm, &qdev->dbc[i].req_lock);
+		if (ret)
+			return NULL;
 	}
 
 	return qdev;