wifi: mac80211: update radar_required in channel context after channel switch

Currently, when a non-DFS channel is brought up and the bandwidth is
expanded from 80 MHz to 160 MHz, where the primary 80 MHz is non-DFS
and the secondary 80 MHz consists of DFS channels, radar detection
fails if radar occurs in the secondary 80 MHz.

When the channel is switched from 80 MHz to 160 MHz, with the primary
80 MHz being non-DFS and the secondary 80 MHz consisting of DFS
channels, the radar required flag in the channel switch parameters
is set to true. However, when using a reserved channel context,
it is not updated in sdata, which disables radar detection in the
secondary 80 MHz DFS channels.

Update the radar required flag in sdata to fix this issue when using
a reserved channel context.

Signed-off-by: Ramya Gnanasekar <ramya.gnanasekar@oss.qualcomm.com>
Signed-off-by: Ramasamy Kaliappan <ramasamy.kaliappan@oss.qualcomm.com>
Link: https://patch.msgid.link/20250608140324.1687117-1-ramasamy.kaliappan@oss.qualcomm.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index 94c83f58e23d0666af881e5e0c981cca17231bfd..d62f91656a1953b71439dad7ea2bcda89949df34 100644 (file)
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -1405,6 +1405,7 @@ ieee80211_link_use_reserved_reassign(struct ieee80211_link_data *link)
                goto out;
        }
 
+       link->radar_required = link->reserved_radar_required;
        list_move(&link->assigned_chanctx_list, &new_ctx->assigned_links);
        rcu_assign_pointer(link_conf->chanctx_conf, &new_ctx->conf);