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wifi: mac80211: allow bw change during channel switch in mesh

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[ Upstream commit 6b75f133fe05c36c52d691ff21545d5757fff721 ]

From 'IEEE Std 802.11-2020 section 11.8.8.4.1':
  The mesh channel switch may be triggered by the need to avoid
  interference to a detected radar signal, or to reassign mesh STA
  channels to ensure the MBSS connectivity.

  A 20/40 MHz MBSS may be changed to a 20 MHz MBSS and a 20 MHz
  MBSS may be changed to a 20/40 MHz MBSS.

Since the standard allows the change of bandwidth during
the channel switch in mesh, remove the bandwidth check present in
ieee80211_set_csa_beacon.

Fixes: c6da674aff ("{nl,cfg,mac}80211: enable the triggering of CSA frame in mesh")
Signed-off-by: Hari Chandrakanthan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
This commit is contained in:
Hari Chandrakanthan 2022-07-27 12:02:29 +05:30 • committed by Greg Kroah-Hartman
commit 9ee70c3cb4
1 changed files with 0 additions and 3 deletions
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3
net/mac80211/cfg.c
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@ -3280,9 +3280,6 @@ static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
case NL80211_IFTYPE_MESH_POINT: {
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
if (params->chandef.width != sdata->vif.bss_conf.chandef.width)
return -EINVAL;
/* changes into another band are not supported */
if (sdata->vif.bss_conf.chandef.chan->band !=
params->chandef.chan->band)