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mac80211: fix scan when operating on DFS channels in ETSI domains

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In non-ETSI regulatory domains scan is blocked when operating channel
is a DFS channel. For ETSI, however, once DFS channel is marked as
available after the CAC, this channel will remain available (for some
time) even after leaving this channel.

Therefore a scan can be done without any impact on the availability
of the DFS channel as no new CAC is required after the scan.

Enable scan in mac80211 in these cases.

Signed-off-by: Aaron Komisar <aaron.komisar@tandemg.com>
Link: https://lore.kernel.org/r/1570024728-17284-1-git-send-email-aaron.komisar@tandemg.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Aaron Komisar 2019-10-02 13:59:07 +00:00 • committed by Johannes Berg
parent 95697f9907
commit dc0c18ed22
4 changed files with 37 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

1
net/wireless/reg.c
View file

@ -3883,6 +3883,7 @@ bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
return pre_cac_allowed;
}
EXPORT_SYMBOL(regulatory_pre_cac_allowed);
void regulatory_propagate_dfs_state(struct wiphy *wiphy,
struct cfg80211_chan_def *chandef,

8
net/wireless/reg.h
View file

@ -155,14 +155,6 @@ bool regulatory_indoor_allowed(void);
*/
#define REG_PRE_CAC_EXPIRY_GRACE_MS 2000
/**
* regulatory_pre_cac_allowed - if pre-CAC allowed in the current dfs domain
* @wiphy: wiphy for which pre-CAC capability is checked.
* Pre-CAC is allowed only in ETSI domain.
*/
bool regulatory_pre_cac_allowed(struct wiphy *wiphy);
/**
* regulatory_propagate_dfs_state - Propagate DFS channel state to other wiphys
* @wiphy - wiphy on which radar is detected and the event will be propagated