1 files changed, 29 insertions, 4 deletions

diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c
index 383ed527dad9..5df339e9f67c 100644
--- a/drivers/net/ethernet/ti/davinci_emac.c
+++ b/drivers/net/ethernet/ti/davinci_emac.c
@@ -1538,7 +1538,13 @@ static int emac_dev_open(struct net_device *ndev)
         int i = 0;
         struct emac_priv *priv = netdev_priv(ndev);
 
-        pm_runtime_get(&priv->pdev->dev);
+        ret = pm_runtime_get_sync(&priv->pdev->dev);
+        if (ret < 0) {
+                pm_runtime_put_noidle(&priv->pdev->dev);
+                dev_err(&priv->pdev->dev, "%s: failed to get_sync(%d)\n",
+                        __func__, ret);
+                return ret;
+        }
 
         netif_carrier_off(ndev);
         for (cnt = 0; cnt < ETH_ALEN; cnt++)
@@ -1725,6 +1731,15 @@ static struct net_device_stats *emac_dev_getnetstats(struct net_device *ndev)
         struct emac_priv *priv = netdev_priv(ndev);
         u32 mac_control;
         u32 stats_clear_mask;
+        int err;
+
+        err = pm_runtime_get_sync(&priv->pdev->dev);
+        if (err < 0) {
+                pm_runtime_put_noidle(&priv->pdev->dev);
+                dev_err(&priv->pdev->dev, "%s: failed to get_sync(%d)\n",
+                        __func__, err);
+                return &ndev->stats;
+        }
 
         /* update emac hardware stats and reset the registers*/
 
@@ -1767,6 +1782,8 @@ static struct net_device_stats *emac_dev_getnetstats(struct net_device *ndev)
         ndev->stats.tx_fifo_errors += emac_read(EMAC_TXUNDERRUN);
         emac_write(EMAC_TXUNDERRUN, stats_clear_mask);
 
+        pm_runtime_put(&priv->pdev->dev);
+
         return &ndev->stats;
 }
 
@@ -1981,12 +1998,22 @@ static int davinci_emac_probe(struct platform_device *pdev)
         ndev->ethtool_ops = &ethtool_ops;
         netif_napi_add(ndev, &priv->napi, emac_poll, EMAC_POLL_WEIGHT);
 
+        pm_runtime_enable(&pdev->dev);
+        rc = pm_runtime_get_sync(&pdev->dev);
+        if (rc < 0) {
+                pm_runtime_put_noidle(&pdev->dev);
+                dev_err(&pdev->dev, "%s: failed to get_sync(%d)\n",
+                        __func__, rc);
+                goto no_cpdma_chan;
+        }
+
         /* register the network device */
         SET_NETDEV_DEV(ndev, &pdev->dev);
         rc = register_netdev(ndev);
         if (rc) {
                 dev_err(&pdev->dev, "error in register_netdev\n");
                 rc = -ENODEV;
+                pm_runtime_put(&pdev->dev);
                 goto no_cpdma_chan;
         }
 
@@ -1996,9 +2023,7 @@ static int davinci_emac_probe(struct platform_device *pdev)
                            "(regs: %p, irq: %d)\n",
                            (void *)priv->emac_base_phys, ndev->irq);
         }
-
-        pm_runtime_enable(&pdev->dev);
-        pm_runtime_resume(&pdev->dev);
+        pm_runtime_put(&pdev->dev);
 
         return 0;