pt., 20 sie 2021 o 18:45 Ben Greear <greearb@xxxxxxxxxxxxxxx> napisał(a): > > Hello, > > While poking at the MTK driver and trying to fix some CAC bugs in it, > I noticed the following: > > Select ch 100, which enables DFS CAC logic. Wait for that to finish. > Then select CH 36 (disable DFS) > Then select ch 100 again, and the chandef->chan->dfs_state is set back to 0 > which I think means we must do CAC again. > > I was expecting in this case that the DFS state would be set to NL80211_DFS_AVAILABLE > instead, since CAC just passed a few minutes prior? > This depends on DFS region (country). EU allow preCAC - once you pass CAC then you can switch to other channel and - the old one will be DFS_AVAILABLE - no need to do CAC again. All other regions don't allow preCAC - so each channel switch will clear DFS_AVAILABLE and require CAC again. BR Janusz
