From 2d3b5b0a90e5370ad13ca98d95519c3e41d2c925 Mon Sep 17 00:00:00 2001 From: Phoebe Buckheister Date: Wed, 11 Jun 2014 12:03:07 +0200 Subject: mac802154: don't deliver packets to devices that are down Only one WPAN devices can be active at any given time, so only deliver packets to that one interface that is actually up. Multiple monitors may be up at any given time, but we don't have to deliver to monitors that are down either. Signed-off-by: Phoebe Buckheister Signed-off-by: David S. Miller --- net/mac802154/monitor.c | 3 ++- net/mac802154/rx.c | 11 +++++++---- net/mac802154/wpan.c | 13 ++++++++----- 3 files changed, 17 insertions(+), 10 deletions(-) diff --git a/net/mac802154/monitor.c b/net/mac802154/monitor.c index 434a26f..a68230e 100644 --- a/net/mac802154/monitor.c +++ b/net/mac802154/monitor.c @@ -70,7 +70,8 @@ void mac802154_monitors_rx(struct mac802154_priv *priv, struct sk_buff *skb) rcu_read_lock(); list_for_each_entry_rcu(sdata, &priv->slaves, list) { - if (sdata->type != IEEE802154_DEV_MONITOR) + if (sdata->type != IEEE802154_DEV_MONITOR || + !netif_running(sdata->dev)) continue; skb2 = skb_clone(skb, GFP_ATOMIC); diff --git a/net/mac802154/rx.c b/net/mac802154/rx.c index 0597b96..7f820a1 100644 --- a/net/mac802154/rx.c +++ b/net/mac802154/rx.c @@ -64,20 +64,23 @@ mac802154_subif_rx(struct ieee802154_dev *hw, struct sk_buff *skb, u8 lqi) if (skb->len < 2) { pr_debug("got invalid frame\n"); - goto out; + goto fail; } crc = crc_ccitt(0, skb->data, skb->len); if (crc) { pr_debug("CRC mismatch\n"); - goto out; + goto fail; } skb_trim(skb, skb->len - 2); /* CRC */ } mac802154_monitors_rx(priv, skb); mac802154_wpans_rx(priv, skb); -out: - dev_kfree_skb(skb); + + return; + +fail: + kfree_skb(skb); } static void mac802154_rx_worker(struct work_struct *work) diff --git a/net/mac802154/wpan.c b/net/mac802154/wpan.c index c8cfd54..3c3069f 100644 --- a/net/mac802154/wpan.c +++ b/net/mac802154/wpan.c @@ -567,7 +567,6 @@ static int mac802154_parse_frame_start(struct sk_buff *skb, void mac802154_wpans_rx(struct mac802154_priv *priv, struct sk_buff *skb) { int ret; - struct sk_buff *sskb; struct mac802154_sub_if_data *sdata; struct ieee802154_hdr hdr; @@ -579,12 +578,16 @@ void mac802154_wpans_rx(struct mac802154_priv *priv, struct sk_buff *skb) rcu_read_lock(); list_for_each_entry_rcu(sdata, &priv->slaves, list) { - if (sdata->type != IEEE802154_DEV_WPAN) + if (sdata->type != IEEE802154_DEV_WPAN || + !netif_running(sdata->dev)) continue; - sskb = skb_clone(skb, GFP_ATOMIC); - if (sskb) - mac802154_subif_frame(sdata, sskb, &hdr); + mac802154_subif_frame(sdata, skb, &hdr); + skb = NULL; + break; } rcu_read_unlock(); + + if (skb) + kfree_skb(skb); } -- cgit v1.1