mac80211: fix the mesh channel switch support

Mesh STA receiving the mesh CSA action frame is not able to trigger
the mesh channel switch due to the incorrect handling and comparison
of mesh channel switch parameters element (MCSP)'s TTL. Make sure
the MCSP's TTL is updated accordingly before calling the
ieee80211_mesh_process_chnswitch. Also, we update the beacon before
forwarding the CSA action frame, so MCSP's precedence value and
initiator flag need to be updated prior to this.

Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 0 insertions, 5 deletions

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index e9ce36d32ef5..9f9b9bd3fd44 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -2457,14 +2457,9 @@ int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
                 pos += 2;
-                if (!ifmsh->pre_value)
-                        ifmsh->pre_value = 1;
-                else
-                        ifmsh->pre_value++;
                 pre_value = cpu_to_le16(ifmsh->pre_value);
                 memcpy(pos, &pre_value, 2);             /* Precedence Value */
                 pos += 2;
-                ifmsh->chsw_init = true;
         }
 
         ieee80211_tx_skb(sdata, skb);