[PATCH] mac80211: adjust the replace_state of ieee80211_find_chanctx()

[Johannes Berg]

On Sat, 2022-03-19 at 06:18 +0800, Ryder Lee wrote:
> We observe that the condition of chanctx could not be back to
> IEEE80211_CHANCTX_REPLACE_NONE occasionally while STA connection.

Not sure I parse this correctly, can you elaborate?

> In this case the state could be IEEE80211_CHANCTX_REPLACE_OTHER, which
> fails the check and then creates another chanctx that leads to the next
> round of chan_switch failure in cfg80211_check_combinations().

But if it's REPLACES_OTHER (note your typo), then it's not yet
registered properly or anything.

> So, modify state to just rule out IEEE80211_CHANCTX_WILL_BE_REPLACED.

Therefore, that really doesn't seem right.

A chanctx with IEEE80211_CHANCTX_REPLACES_OTHER needs to get used via
ieee80211_vif_use_reserved_switch().

johannes