ibmvnic: simplify reset_long_term_buff function

The only thing reset_long_term_buff() should do is set
buffer to zero. After doing that, it is not necessary to
send_request_map again to VIOS since it actually does not
change the mapping. So, keep memset function and remove all
others.
Signed-off-by: NLijun Pan <ljp@linux.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/ibm/ibmvnic.c

@@ -253,40 +253,12 @@ static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 	dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 }
 
-static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
-				struct ibmvnic_long_term_buff *ltb)
+static int reset_long_term_buff(struct ibmvnic_long_term_buff *ltb)
 {
-	struct device *dev = &adapter->vdev->dev;
-	int rc;
+	if (!ltb->buff)
+		return -EINVAL;
 
 	memset(ltb->buff, 0, ltb->size);
-
-	mutex_lock(&adapter->fw_lock);
-	adapter->fw_done_rc = 0;
-
-	reinit_completion(&adapter->fw_done);
-	rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
-	if (rc) {
-		mutex_unlock(&adapter->fw_lock);
-		return rc;
-	}
-
-	rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
-	if (rc) {
-		dev_info(dev,
-			 "Reset failed, long term map request timed out or aborted\n");
-		mutex_unlock(&adapter->fw_lock);
-		return rc;
-	}
-
-	if (adapter->fw_done_rc) {
-		dev_info(dev,
-			 "Reset failed, attempting to free and reallocate buffer\n");
-		free_long_term_buff(adapter, ltb);
-		mutex_unlock(&adapter->fw_lock);
-		return alloc_long_term_buff(adapter, ltb, ltb->size);
-	}
-	mutex_unlock(&adapter->fw_lock);
 	return 0;
 }
 
@@ -508,8 +480,7 @@ static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 						  rx_pool->size *
 						  rx_pool->buff_size);
 		} else {
-			rc = reset_long_term_buff(adapter,
-						  &rx_pool->long_term_buff);
+			rc = reset_long_term_buff(&rx_pool->long_term_buff);
 		}
 
 		if (rc)
@@ -632,12 +603,11 @@ static int init_rx_pools(struct net_device *netdev)
 	return 0;
 }
 
-static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
-			     struct ibmvnic_tx_pool *tx_pool)
+static int reset_one_tx_pool(struct ibmvnic_tx_pool *tx_pool)
 {
 	int rc, i;
 
-	rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
+	rc = reset_long_term_buff(&tx_pool->long_term_buff);
 	if (rc)
 		return rc;
 
@@ -664,10 +634,10 @@ static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 
 	tx_scrqs = adapter->num_active_tx_pools;
 	for (i = 0; i < tx_scrqs; i++) {
-		rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
+		rc = reset_one_tx_pool(&adapter->tso_pool[i]);
 		if (rc)
 			return rc;
-		rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
+		rc = reset_one_tx_pool(&adapter->tx_pool[i]);
 		if (rc)
 			return rc;
 	}