On Mon, 2018-10-22 at 13:27 -0700, Ben Greear wrote: > I was testing on my 4.16 kernel with a bunch of VAPs and I had two configured > for 100 beacon interval, and more at 240. This failed for reasons I figured out > (gcd logic), but even once I tried to configure the vaps for 240 interval they > could not come up. I am thinking maybe it was because I could only re-configure > admin-up interfaces, and they couldn't come up due the gcd thing? > > Anyway, while poking, I thought maybe the patch below would be helpful since > we shouldn't care about admin-down interfaces in this case? > > diff --git a/net/wireless/util.c b/net/wireless/util.c > index fbc880e..56d7583 100644 > --- a/net/wireless/util.c > +++ b/net/wireless/util.c > @@ -1541,6 +1541,9 @@ static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int, > if (wdev->beacon_interval == *beacon_int_gcd) > continue; > > + if (!netif_running(wdev->netdev)) > + continue; > + I don't think we'd ever get to this check, since those interfaces will always have wdev->beacon_interval == 0, checked a few lines before this code at the beginning of the loop? At least they should have, but a quick check suggests that is true. johannes
