fs_enet: Update for API changes

This driver was recently broken by several changes for which this
driver was not (or was improperly) updated:

1. SET_MODULE_OWNER() was removed.
2. netif_napi_add() was only being called when building with
the old CPM binding.
3. The received/budget test was backwards.
4. to_net_dev() was wrong -- the device struct embedded in
the net_device struct is not the same as the of_platform
device in the private struct.
5. napi_disable/napi_enable was being called even when napi
was not being used.

These changes have been fixed, and napi is now on by default.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

2 files changed, 17 insertions, 12 deletions

diff --git a/drivers/net/fs_enet/fs_enet-main.c b/drivers/net/fs_enet/fs_enet-main.c
index 04c6faec88d2..f2a4d399a6e5 100644
--- a/drivers/net/fs_enet/fs_enet-main.c
+++ b/drivers/net/fs_enet/fs_enet-main.c
@@ -88,7 +88,7 @@ static void skb_align(struct sk_buff *skb, int align)
 static int fs_enet_rx_napi(struct napi_struct *napi, int budget)
 {
         struct fs_enet_private *fep = container_of(napi, struct fs_enet_private, napi);
-        struct net_device *dev = to_net_dev(fep->dev);
+        struct net_device *dev = fep->ndev;
         const struct fs_platform_info *fpi = fep->fpi;
         cbd_t __iomem *bdp;
         struct sk_buff *skb, *skbn, *skbt;
@@ -217,7 +217,7 @@ static int fs_enet_rx_napi(struct napi_struct *napi, int budget)
 
         fep->cur_rx = bdp;
 
-        if (received >= budget) {
+        if (received < budget) {
                 /* done */
                 netif_rx_complete(dev, napi);
                 (*fep->ops->napi_enable_rx)(dev);
@@ -807,20 +807,23 @@ static int fs_enet_open(struct net_device *dev)
         int r;
         int err;
 
-        napi_enable(&fep->napi);
+        if (fep->fpi->use_napi)
+                napi_enable(&fep->napi);
 
         /* Install our interrupt handler. */
         r = fs_request_irq(dev, fep->interrupt, "fs_enet-mac", fs_enet_interrupt);
         if (r != 0) {
                 printk(KERN_ERR DRV_MODULE_NAME
                        ": %s Could not allocate FS_ENET IRQ!", dev->name);
-                napi_disable(&fep->napi);
+                if (fep->fpi->use_napi)
+                        napi_disable(&fep->napi);
                 return -EINVAL;
         }
 
         err = fs_init_phy(dev);
-        if(err) {
-                napi_disable(&fep->napi);
+        if (err) {
+                if (fep->fpi->use_napi)
+                        napi_disable(&fep->napi);
                 return err;
         }
         phy_start(fep->phydev);
@@ -1232,7 +1235,7 @@ static int __devinit fs_enet_probe(struct of_device *ofdev,
         fpi->rx_ring = 32;
         fpi->tx_ring = 32;
         fpi->rx_copybreak = 240;
-        fpi->use_napi = 0;
+        fpi->use_napi = 1;
         fpi->napi_weight = 17;
 
         ret = find_phy(ofdev->node, fpi);
@@ -1249,11 +1252,11 @@ static int __devinit fs_enet_probe(struct of_device *ofdev,
                 goto out_free_fpi;
         }
 
-        SET_MODULE_OWNER(ndev);
         dev_set_drvdata(&ofdev->dev, ndev);
 
         fep = netdev_priv(ndev);
         fep->dev = &ofdev->dev;
+        fep->ndev = ndev;
         fep->fpi = fpi;
         fep->ops = match->data;
 
@@ -1288,10 +1291,11 @@ static int __devinit fs_enet_probe(struct of_device *ofdev,
         ndev->stop = fs_enet_close;
         ndev->get_stats = fs_enet_get_stats;
         ndev->set_multicast_list = fs_set_multicast_list;
-        if (fpi->use_napi) {
-                ndev->poll = fs_enet_rx_napi;
-                ndev->weight = fpi->napi_weight;
-        }
+
+        if (fpi->use_napi)
+                netif_napi_add(ndev, &fep->napi, fs_enet_rx_napi,
+                               fpi->napi_weight);
+
         ndev->ethtool_ops = &fs_ethtool_ops;
         ndev->do_ioctl = fs_ioctl;
 
diff --git a/drivers/net/fs_enet/fs_enet.h b/drivers/net/fs_enet/fs_enet.h
index baf6477165af..c675e29aadcc 100644
--- a/drivers/net/fs_enet/fs_enet.h
+++ b/drivers/net/fs_enet/fs_enet.h
@@ -75,6 +75,7 @@ struct phy_info {
 struct fs_enet_private {
         struct napi_struct napi;
         struct device *dev;     /* pointer back to the device (must be initialized first) */
+        struct net_device *ndev;
         spinlock_t lock;        /* during all ops except TX pckt processing */
         spinlock_t tx_lock;     /* during fs_start_xmit and fs_tx         */
         struct fs_platform_info *fpi;