From: Andrew Lunn Date: Sat, 4 Jun 2016 19:16:56 +0000 (+0200) Subject: net: dsa: tag_{e}dsa.c: Remove dependency on platform data X-Git-Tag: v4.8-rc1~140^2~431^2~13 X-Git-Url: http://git.cascardo.eti.br/?a=commitdiff_plain;h=149cafd790573294752787f5ce1dc0f99e4088d3;p=cascardo%2Flinux.git 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 Reviewed-by: Florian Fainelli Reviewed-by: Vivien Didelot Signed-off-by: David S. Miller --- diff --git a/net/dsa/tag_dsa.c b/net/dsa/tag_dsa.c index aa780e4ac0bd..f9832f097681 100644 --- a/net/dsa/tag_dsa.c +++ b/net/dsa/tag_dsa.c @@ -107,9 +107,13 @@ static int dsa_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; 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;