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dsa: do not dereference non-existing routing table 

In the case where there is only one switch, no routing table will have
been allocated, so do not dereference it in this case.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tobias Waldekranz 2015-02-05 14:52:06 +01:00 committed by David S. Miller
parent 11b1f8288d
commit 6e0ba47f91
1 changed files with 2 additions and 1 deletions
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3
drivers/net/dsa/mv88e6131.c
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@ -139,7 +139,8 @@ static int mv88e6131_setup_global(struct dsa_switch *ds)
int nexthop;
nexthop = 0x1f;
if (i != ds->index && i < ds->dst->pd->nr_chips)
if (ds->pd->rtable &&
i != ds->index && i < ds->dst->pd->nr_chips)
nexthop = ds->pd->rtable[i] & 0x1f;
REG_WRITE(REG_GLOBAL2, 0x06, 0x8000 | (i << 8) | nexthop);