From: Eric Dumazet Date: Fri, 1 Oct 2010 16:14:55 +0000 (+0000) Subject: ipmr: __pim_rcv() is called under rcu_read_lock X-Git-Tag: v2.6.37-rc1~147^2~273 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=55747a0a73ea74a25fcebb0731e8d3f13fe8c09d;p=~shefty%2Frdma-dev.git ipmr: __pim_rcv() is called under rcu_read_lock No need to get a reference on reg_dev and release it, we are in a rcu_read_lock() protected section. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index 10b24c02deb..1a92ebd8519 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -1805,6 +1805,7 @@ dont_forward: } #ifdef CONFIG_IP_PIMSM +/* called with rcu_read_lock() */ static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb, unsigned int pimlen) { @@ -1826,26 +1827,23 @@ static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb, read_lock(&mrt_lock); if (mrt->mroute_reg_vif_num >= 0) reg_dev = mrt->vif_table[mrt->mroute_reg_vif_num].dev; - if (reg_dev) - dev_hold(reg_dev); read_unlock(&mrt_lock); if (reg_dev == NULL) return 1; skb->mac_header = skb->network_header; - skb_pull(skb, (u8*)encap - skb->data); + skb_pull(skb, (u8 *)encap - skb->data); skb_reset_network_header(skb); skb->protocol = htons(ETH_P_IP); - skb->ip_summed = 0; + skb->ip_summed = CHECKSUM_NONE; skb->pkt_type = PACKET_HOST; skb_tunnel_rx(skb, reg_dev); netif_rx(skb); - dev_put(reg_dev); - return 0; + return NET_RX_SUCCESS; } #endif