On Fri, 09 Feb 2018 10:01:09 +0200
Kalle Valo <kv...@codeaurora.org> wrote:
> Timothy Redaelli <tredae...@redhat.com> writes:
> > The code currently syncronize the DFS region only if curchan != 0,
> > but hostapd launch DFS before the channel is set and so
> > set_dfs_domain is never executed.
> > CC: Felix Fietkau <n...@nbd.name>
> > Signed-off-by: Timothy Redaelli <tredae...@redhat.com>
> What kind of bug does this fix? Please describe the symptoms from
> user's point of view.
With the current code radar detection (CAC) doesn't work on ath9k
since "dpd_set_domain" is only called once with NL80211_DFS_UNSET (0) as
region and so "dpd_add_pulse" always returns true (radar detected)
without doing a real scan.
You can test it easily with a kernel built with
CONFIG_ATH9K_DFS_CERTIFIED and by using a simple hostapd configuration:
chanlist=100 104 108 112 116 120 124 128 132 136 140