diff --git a/drivers/infiniband/core/agent.c b/drivers/infiniband/core/agent.c
index 7aee5eb..23d1957 100644
--- a/drivers/infiniband/core/agent.c
+++ b/drivers/infiniband/core/agent.c
@@ -129,7 +129,6 @@
 		goto out;
 	agent_send_wr->mad = mad_priv;
 
-	/* PCI mapping */
 	gather_list.addr = dma_map_single(mad_agent->device->dma_device,
 					  &mad_priv->mad,
 					  sizeof(mad_priv->mad),
@@ -261,7 +260,6 @@
 	list_del(&agent_send_wr->send_list);
 	spin_unlock_irqrestore(&port_priv->send_list_lock, flags);
 
-	/* Unmap PCI */
 	dma_unmap_single(mad_agent->device->dma_device,
 			 pci_unmap_addr(agent_send_wr, mapping),
 			 sizeof(agent_send_wr->mad->mad),
diff --git a/drivers/infiniband/core/mad.c b/drivers/infiniband/core/mad.c
index aceb26f..23628c6 100644
--- a/drivers/infiniband/core/mad.c
+++ b/drivers/infiniband/core/mad.c
@@ -2283,7 +2283,6 @@
 		/* Remove from posted receive MAD list */
 		list_del(&mad_list->list);
 
-		/* Undo PCI mapping */
 		dma_unmap_single(qp_info->port_priv->device->dma_device,
 				 pci_unmap_addr(&recv->header, mapping),
 				 sizeof(struct ib_mad_private) -