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Subject[PATCH 17/18] staging: fsl-dpaa2/eth: Refactor MAC address setup
Date
The driver logic for allocating a MAC address to a net device
is complicated enough to deserve a function of its own. While
here, cleanup a bit the code comments.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
---
drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c | 46 ++++++++++++++++----------
1 file changed, 29 insertions(+), 17 deletions(-)

diff --git a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
index 7dca8c2e5ff9..3f7f61b9c462 100644
--- a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
+++ b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
@@ -2162,15 +2162,12 @@ static void free_rings(struct dpaa2_eth_priv *priv)
dpaa2_io_store_destroy(priv->channel[i]->store);
}

-static int netdev_init(struct net_device *net_dev)
+static int set_mac_addr(struct dpaa2_eth_priv *priv)
{
- int err;
+ struct net_device *net_dev = priv->net_dev;
struct device *dev = net_dev->dev.parent;
- struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
u8 mac_addr[ETH_ALEN], dpni_mac_addr[ETH_ALEN];
- u8 bcast_addr[ETH_ALEN];
-
- net_dev->netdev_ops = &dpaa2_eth_ops;
+ int err;

/* Get firmware address, if any */
err = dpni_get_port_mac_addr(priv->mc_io, 0, priv->mc_token, mac_addr);
@@ -2183,7 +2180,7 @@ static int netdev_init(struct net_device *net_dev)
err = dpni_get_primary_mac_addr(priv->mc_io, 0, priv->mc_token,
dpni_mac_addr);
if (err) {
- dev_err(dev, "dpni_get_primary_mac_addr() failed (%d)\n", err);
+ dev_err(dev, "dpni_get_primary_mac_addr() failed\n");
return err;
}

@@ -2201,18 +2198,19 @@ static int netdev_init(struct net_device *net_dev)
}
memcpy(net_dev->dev_addr, mac_addr, net_dev->addr_len);
} else if (is_zero_ether_addr(dpni_mac_addr)) {
- /* Fills in net_dev->dev_addr, as required by
- * register_netdevice()
+ /* No MAC address configured, fill in net_dev->dev_addr
+ * with a random one
*/
eth_hw_addr_random(net_dev);
- /* Make the user aware, without cluttering the boot log */
- dev_dbg_once(dev, " device(s) have all-zero hwaddr, replaced with random\n");
+ dev_dbg_once(dev, "device(s) have all-zero hwaddr, replaced with random\n");
+
err = dpni_set_primary_mac_addr(priv->mc_io, 0, priv->mc_token,
net_dev->dev_addr);
if (err) {
- dev_err(dev, "dpni_set_primary_mac_addr(): %d\n", err);
+ dev_err(dev, "dpni_set_primary_mac_addr() failed\n");
return err;
}
+
/* Override NET_ADDR_RANDOM set by eth_hw_addr_random(); for all
* practical purposes, this will be our "permanent" mac address,
* at least until the next reboot. This move will also permit
@@ -2226,14 +2224,28 @@ static int netdev_init(struct net_device *net_dev)
memcpy(net_dev->dev_addr, dpni_mac_addr, net_dev->addr_len);
}

- /* Explicitly add the broadcast address to the MAC filtering table;
- * the MC won't do that for us.
- */
+ return 0;
+}
+
+static int netdev_init(struct net_device *net_dev)
+{
+ struct device *dev = net_dev->dev.parent;
+ struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
+ u8 bcast_addr[ETH_ALEN];
+ int err;
+
+ net_dev->netdev_ops = &dpaa2_eth_ops;
+
+ err = set_mac_addr(priv);
+ if (err)
+ return err;
+
+ /* Explicitly add the broadcast address to the MAC filtering table */
eth_broadcast_addr(bcast_addr);
err = dpni_add_mac_addr(priv->mc_io, 0, priv->mc_token, bcast_addr);
if (err) {
- dev_warn(dev, "dpni_add_mac_addr() failed (%d)\n", err);
- /* Won't return an error; at least, we'd have egress traffic */
+ dev_err(dev, "dpni_add_mac_addr() failed\n");
+ return err;
}

/* Reserve enough space to align buffer as per hardware requirement;
--
2.11.0
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