Commit 769a0202 authored by Florian Fainelli's avatar Florian Fainelli Committed by David S. Miller
Browse files

net: dsa: utilize of_find_net_device_by_node 



Using of_find_device_by_node() restricts the search to platform_device that
match the specified device_node pointer. This is not even remotely true for
network devices backed by a pci_device for instance.

of_find_net_device_by_node() allows us to do a more thorough lookup to find the
struct net_device corresponding to a particular device_node pointer.

For symetry with the non-OF code path, we hold the net_device pointer in
dsa_probe() just like what dev_to_net_dev() does when we call this
function.

Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent aa836df9

include/net/dsa.h

+1 −0
Original line number Diff line number Diff line
@@ -72,6 +72,7 @@ struct dsa_platform_data { 
	 * to the root switch chip of the tree.

	 */

	struct device	*netdev;

	struct net_device *of_netdev;



	/*

	 * Info structs describing each of the switch chips

net/dsa/dsa.c

+11 −5
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
#include <linux/of.h>

#include <linux/of_mdio.h>

#include <linux/of_platform.h>

#include <linux/of_net.h>

#include <linux/sysfs.h>

#include "dsa_priv.h"
@@ -583,7 +584,7 @@ static int dsa_of_probe(struct device *dev) 
	struct device_node *np = dev->of_node;

	struct device_node *child, *mdio, *ethernet, *port, *link;

	struct mii_bus *mdio_bus;

	struct platform_device *ethernet_dev;

	struct net_device *ethernet_dev;

	struct dsa_platform_data *pd;

	struct dsa_chip_data *cd;

	const char *port_name;
@@ -604,7 +605,7 @@ static int dsa_of_probe(struct device *dev) 
	if (!ethernet)

		return -EINVAL;



	ethernet_dev = of_find_device_by_node(ethernet);

	ethernet_dev = of_find_net_device_by_node(ethernet);

	if (!ethernet_dev)

		return -EPROBE_DEFER;
@@ -613,7 +614,7 @@ static int dsa_of_probe(struct device *dev) 
		return -ENOMEM;



	dev->platform_data = pd;

	pd->netdev = &ethernet_dev->dev;

	pd->of_netdev = ethernet_dev;

	pd->nr_chips = of_get_available_child_count(np);

	if (pd->nr_chips > DSA_MAX_SWITCHES)

		pd->nr_chips = DSA_MAX_SWITCHES;
@@ -771,10 +772,15 @@ static int dsa_probe(struct platform_device *pdev) 
		pd = pdev->dev.platform_data;

	}



	if (pd == NULL || pd->netdev == NULL)

	if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL))

		return -EINVAL;



	if (pd->of_netdev) {

		dev = pd->of_netdev;

		dev_hold(dev);

	} else {

		dev = dev_to_net_device(pd->netdev);

	}

	if (dev == NULL) {

		ret = -EPROBE_DEFER;

		goto out;

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