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net: dsa: remove copy of master ethtool_ops

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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: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot 2017-09-19 11:56:57 -04:00 • committed by David S. Miller
parent 69e33b2754
commit f561986659
3 changed files with 15 additions and 13 deletions
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8
net/dsa/dsa.c
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@ -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)