On 9/25/2018 11:28 AM, Enrique Giraldo wrote:
The main reason is to be able to stop the CAC when you want to make a channel switch and the CAC is ongoing. It's true that the radio would not pass to the next phase, the behavior is the same as when during the CAC a radar event is detected. In the case of aborting, a later action is expected, for example, switch to the desired new channel.
So for mac80211 the function ieee80211_dfs_cancel_cac() indeed seems to just abort. So what is the scenario here? If user-space sends NL80211_CMD_START_AP with DFS channel, a CAC period is started. So you are saying you want to do a channel switch? Does it not make sense to issue a NL80211_CMD_STOP_AP and then NL80211_CMD_START_AP for the desired channel? Maybe the use-case you are looking at is not AP mode, but there is no context whatsoever in the commit message so I can only guess.
Regards, Arend
