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wifi: mac80211: don't allow deactivation of all links

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The set_active_links API is intended for link switching, so switching
to no links at all is not supported.
Add a warning to check that.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240129200054.e3c113f94508.Ia35f927f914bf98dd8f9350dd4f78b1d901b1c1d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Miri Korenblit 2024-01-29 20:00:53 +01:00 committed by Johannes Berg
parent 358ddc7bfa
commit b341590e77
1 changed files with 6 additions and 0 deletions
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6
net/mac80211/link.c
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@ -444,6 +444,9 @@ int ieee80211_set_active_links(struct ieee80211_vif *vif, u16 active_links)
lockdep_assert_wiphy(local->hw.wiphy);
if (WARN_ON(!active_links))
return -EINVAL;
if (!drv_can_activate_links(local, sdata, active_links))
return -EINVAL;
@ -472,6 +475,9 @@ void ieee80211_set_active_links_async(struct ieee80211_vif *vif,
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
if (WARN_ON(!active_links))
return;
if (!ieee80211_sdata_running(sdata))
return;