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net: dsa: change dsa_ptr for a dsa_port

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With DSA, a master net device (CPU facing interface) has a dsa_ptr
pointer to which hangs a dsa_switch_tree. This is not correct because a
master interface is wired to a dedicated switch port, and because we can
theoretically have several master interfaces pointing to several CPU
ports of the same switch fabric.

Change the master interface's dsa_ptr for the CPU dsa_port pointer.
This is a step towards supporting multiple CPU ports.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot 2017-09-29 17:19:20 -04:00 • committed by David S. Miller
parent 3e41f93b35
commit 2f657a6004
6 changed files with 14 additions and 18 deletions
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3
net/dsa/dsa_priv.h
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@ -116,7 +116,8 @@ void dsa_master_ethtool_restore(struct net_device *dev);
static inline struct net_device *dsa_master_get_slave(struct net_device *dev,
int device, int port)
{
struct dsa_switch_tree *dst = dev->dsa_ptr;
struct dsa_port *cpu_dp = dev->dsa_ptr;
struct dsa_switch_tree *dst = cpu_dp->dst;
struct dsa_switch *ds;
if (device < 0 || device >= DSA_MAX_SWITCHES)