diff options
Diffstat (limited to 'net/mac80211/mesh_hwmp.c')
| -rw-r--r-- | net/mac80211/mesh_hwmp.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c index fd4f76a3e139..6df7913d7ca4 100644 --- a/net/mac80211/mesh_hwmp.c +++ b/net/mac80211/mesh_hwmp.c @@ -8,6 +8,7 @@ */ #include <linux/slab.h> +#include "wme.h" #include "mesh.h" #ifdef CONFIG_MAC80211_VERBOSE_MHWMP_DEBUG @@ -202,6 +203,26 @@ static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags, return 0; } + +/* Headroom is not adjusted. Caller should ensure that skb has sufficient + * headroom in case the frame is encrypted. */ +static void prepare_frame_for_deferred_tx(struct ieee80211_sub_if_data *sdata, + struct sk_buff *skb) +{ + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + + skb_set_mac_header(skb, 0); + skb_set_network_header(skb, 0); + skb_set_transport_header(skb, 0); + + /* Send all internal mgmt frames on VO. Accordingly set TID to 7. */ + skb_set_queue_mapping(skb, IEEE80211_AC_VO); + skb->priority = 7; + + info->control.vif = &sdata->vif; + ieee80211_set_qos_hdr(sdata, skb); +} + /** * mesh_send_path error - Sends a PERR mesh management frame * @@ -209,6 +230,10 @@ static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags, * @target_sn: SN of the broken destination * @target_rcode: reason code for this PERR * @ra: node this frame is addressed to + * + * Note: This function may be called with driver locks taken that the driver + * also acquires in the TX path. To avoid a deadlock we don't transmit the + * frame directly but add it to the pending queue instead. */ int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn, __le16 target_rcode, const u8 *ra, @@ -222,7 +247,7 @@ int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn, if (!skb) return -1; - skb_reserve(skb, local->hw.extra_tx_headroom); + skb_reserve(skb, local->tx_headroom + local->hw.extra_tx_headroom); /* 25 is the size of the common mgmt part (24) plus the size of the * common action part (1) */ @@ -263,7 +288,9 @@ int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn, pos += 4; memcpy(pos, &target_rcode, 2); - ieee80211_tx_skb(sdata, skb); + /* see note in function header */ + prepare_frame_for_deferred_tx(sdata, skb); + ieee80211_add_pending_skb(local, skb); return 0; } |