Patch "wifi: mac80211: mesh: init nonpeer_pm to active by default in mesh sdata" has been added to the 4.19-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    wifi: mac80211: mesh: init nonpeer_pm to active by default in mesh sdata

to the 4.19-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     wifi-mac80211-mesh-init-nonpeer_pm-to-active-by-defa.patch
and it can be found in the queue-4.19 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 89d00f684c8395130b9950ca29a2528cde03a353
Author: Nicolas Escande <nico.escande@xxxxxxxxx>
Date:   Mon May 27 16:17:59 2024 +0200

    wifi: mac80211: mesh: init nonpeer_pm to active by default in mesh sdata
    
    [ 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@xxxxxxxxx>
    Link: https://msgid.link/20240527141759.299411-1-nico.escande@xxxxxxxxx
    Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

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();