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Commit f5619866 authored by Vivien Didelot's avatar Vivien Didelot Committed by David S. Miller
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net: dsa: remove copy of master ethtool_ops 



There is no need to store a copy of the master ethtool ops, storing the
original pointer in DSA and the new one in the master netdev itself is
enough.

In the meantime, set orig_ethtool_ops to NULL when restoring the master
ethtool ops and check the presence of the master original ethtool ops as
well as its needed functions before calling them.

Signed-off-by: default avatarVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 69e33b27

include/net/dsa.h

+0 −1
Original line number Diff line number Diff line
@@ -188,7 +188,6 @@ struct dsa_port { 
	/*

	 * Original copy of the master netdev ethtool_ops

	 */

	struct ethtool_ops	ethtool_ops;

	const struct ethtool_ops *orig_ethtool_ops;

};

net/dsa/dsa.c

+4 −4
Original line number Diff line number Diff line
@@ -124,11 +124,10 @@ int dsa_cpu_port_ethtool_setup(struct dsa_port *cpu_dp) 
	if (!cpu_ops)

		return -ENOMEM;



	memcpy(&cpu_dp->ethtool_ops, master->ethtool_ops,

	       sizeof(struct ethtool_ops));

	cpu_dp->orig_ethtool_ops = master->ethtool_ops;

	memcpy(cpu_ops, &cpu_dp->ethtool_ops,

	       sizeof(struct ethtool_ops));

	if (cpu_dp->orig_ethtool_ops)

		memcpy(cpu_ops, cpu_dp->orig_ethtool_ops, sizeof(*cpu_ops));



	dsa_cpu_port_ethtool_init(cpu_ops);

	master->ethtool_ops = cpu_ops;
@@ -138,6 +137,7 @@ int dsa_cpu_port_ethtool_setup(struct dsa_port *cpu_dp) 
void dsa_cpu_port_ethtool_restore(struct dsa_port *cpu_dp)

{

	cpu_dp->netdev->ethtool_ops = cpu_dp->orig_ethtool_ops;

	cpu_dp->orig_ethtool_ops = NULL;

}



void dsa_cpu_dsa_destroy(struct dsa_port *port)

net/dsa/slave.c

+11 −8
Original line number Diff line number Diff line
@@ -574,12 +574,13 @@ static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev, 
	struct dsa_switch_tree *dst = dev->dsa_ptr;

	struct dsa_port *cpu_dp = dsa_get_cpu_port(dst);

	struct dsa_switch *ds = cpu_dp->ds;

	const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops;

	s8 cpu_port = cpu_dp->index;

	int count = 0;



	if (cpu_dp->ethtool_ops.get_sset_count) {

		count = cpu_dp->ethtool_ops.get_sset_count(dev, ETH_SS_STATS);

		cpu_dp->ethtool_ops.get_ethtool_stats(dev, stats, data);

	if (ops && ops->get_sset_count && ops->get_ethtool_stats) {

		count = ops->get_sset_count(dev, ETH_SS_STATS);

		ops->get_ethtool_stats(dev, stats, data);

	}



	if (ds->ops->get_ethtool_stats)
@@ -591,10 +592,11 @@ static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset) 
	struct dsa_switch_tree *dst = dev->dsa_ptr;

	struct dsa_port *cpu_dp = dsa_get_cpu_port(dst);

	struct dsa_switch *ds = cpu_dp->ds;

	const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops;

	int count = 0;



	if (cpu_dp->ethtool_ops.get_sset_count)

		count += cpu_dp->ethtool_ops.get_sset_count(dev, sset);

	if (ops && ops->get_sset_count)

		count += ops->get_sset_count(dev, sset);



	if (sset == ETH_SS_STATS && ds->ops->get_sset_count)

		count += ds->ops->get_sset_count(ds);
@@ -608,6 +610,7 @@ static void dsa_cpu_port_get_strings(struct net_device *dev, 
	struct dsa_switch_tree *dst = dev->dsa_ptr;

	struct dsa_port *cpu_dp = dsa_get_cpu_port(dst);

	struct dsa_switch *ds = cpu_dp->ds;

	const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops;

	s8 cpu_port = cpu_dp->index;

	int len = ETH_GSTRING_LEN;

	int mcount = 0, count;
@@ -619,9 +622,9 @@ static void dsa_cpu_port_get_strings(struct net_device *dev, 
	/* We do not want to be NULL-terminated, since this is a prefix */

	pfx[sizeof(pfx) - 1] = '_';



	if (cpu_dp->ethtool_ops.get_sset_count) {

		mcount = cpu_dp->ethtool_ops.get_sset_count(dev, ETH_SS_STATS);

		cpu_dp->ethtool_ops.get_strings(dev, stringset, data);

	if (ops && ops->get_sset_count && ops->get_strings) {

		mcount = ops->get_sset_count(dev, ETH_SS_STATS);

		ops->get_strings(dev, stringset, data);

	}



	if (stringset == ETH_SS_STATS && ds->ops->get_strings) {