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>
diff --git a/drivers/net/dsa/mv88e6131.c b/drivers/net/dsa/mv88e6131.c
index 1230f52..2540ef0 100644
--- a/drivers/net/dsa/mv88e6131.c
+++ b/drivers/net/dsa/mv88e6131.c
@@ -139,7 +139,8 @@
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);