4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nicolas Escande nico.escande@gmail.com
[ Upstream commit 6f6291f09a322c1c1578badac8072d049363f4e6 ]
With a ath9k device I can see that: iw phy phy0 interface add mesh0 type mp ip link set mesh0 up iw dev mesh0 scan
Will start a scan with the Power Management bit set in the Frame Control Field. This is because we set this bit depending on the nonpeer_pm variable of the mesh iface sdata and when there are no active links on the interface it remains to NL80211_MESH_POWER_UNKNOWN.
As soon as links starts to be established, it wil switch to NL80211_MESH_POWER_ACTIVE as it is the value set by befault on the per sta nonpeer_pm field. As we want no power save by default, (as expressed with the per sta ini values), lets init it to the expected default value of NL80211_MESH_POWER_ACTIVE.
Also please note that we cannot change the default value from userspace prior to establishing a link as using NL80211_CMD_SET_MESH_CONFIG will not work before NL80211_CMD_JOIN_MESH has been issued. So too late for our initial scan.
Signed-off-by: Nicolas Escande nico.escande@gmail.com Link: https://msgid.link/20240527141759.299411-1-nico.escande@gmail.com Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/mac80211/mesh.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c index 3162f955f3ae2..c9a5271d9b59d 100644 --- a/net/mac80211/mesh.c +++ b/net/mac80211/mesh.c @@ -1454,6 +1454,7 @@ void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) ifmsh->last_preq = jiffies; ifmsh->next_perr = jiffies; ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; + ifmsh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; /* Allocate all mesh structures when creating the first mesh interface. */ if (!mesh_allocated) ieee80211s_init();