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authorAndrew Lunn <andrew@lunn.ch>2016-06-04 21:16:56 +0200
committerDavid S. Miller <davem@davemloft.net>2016-06-04 14:29:53 -0700
commit149cafd790573294752787f5ce1dc0f99e4088d3 (patch)
treea7242119cc023908a8544027942a0cbfbe502dbc /net/dsa/tag_edsa.c
parent6e8e862ded41bd966b088960ad6f4dc7a1a3ce36 (diff)
net: dsa: tag_{e}dsa.c: Remove dependency on platform data
The platform data nr_chips is used when validating a received packet, to ensure it comes from a know switch chip. The number of possible switches is limited to DSA_MAX_SWITCHES, so use this as the first validation step. The new binding allows holes in the dst->ds[] array, so also ensure ensure there is a valid dsa_switch for this packet. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa/tag_edsa.c')
-rw-r--r--net/dsa/tag_edsa.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/dsa/tag_edsa.c b/net/dsa/tag_edsa.c
index 2288c8098c42..3890aac8190f 100644
--- a/net/dsa/tag_edsa.c
+++ b/net/dsa/tag_edsa.c
@@ -120,9 +120,13 @@ static int edsa_rcv(struct sk_buff *skb, struct net_device *dev,
* Check that the source device exists and that the source
* port is a registered DSA port.
*/
- if (source_device >= dst->pd->nr_chips)
+ if (source_device >= DSA_MAX_SWITCHES)
goto out_drop;
+
ds = dst->ds[source_device];
+ if (!ds)
+ goto out_drop;
+
if (source_port >= DSA_MAX_PORTS || ds->ports[source_port] == NULL)
goto out_drop;