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net: bridge: assign path_cost for 2.5G and 5G link speed

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As 2.5G, 5G ethernet ports are more common and affordable,
these ports are being used in LAN bridge devices.
STP port_cost() is missing path_cost assignment for these link speeds,
causes highest cost 100 being used.
This result in lower speed port being picked
when there is loop between 5G and 1G ports.

Original path_cost: 10G=2, 1G=4, 100m=19, 10m=100
Adjusted path_cost: 10G=2, 5G=3, 2.5G=4, 1G=5, 100m=19, 10m=100
                    speed greater than 10G = 1

Signed-off-by: Steven Hsieh <steven.hsieh@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steven Hsieh 2022-09-28 10:57:58 -07:00 committed by David S. Miller
parent db7fccc122
commit bd13938153
1 changed files with 10 additions and 1 deletions
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11
net/bridge/br_if.c
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@ -40,12 +40,21 @@ static int port_cost(struct net_device *dev)
switch (ecmd.base.speed) {
case SPEED_10000:
return 2;
case SPEED_1000:
case SPEED_5000:
return 3;
case SPEED_2500:
return 4;
case SPEED_1000:
return 5;
case SPEED_100:
return 19;
case SPEED_10:
return 100;
case SPEED_UNKNOWN:
return 100;
default:
if (ecmd.base.speed > SPEED_10000)
return 1;
}
}