ath10k: Disallow DFS simulation if DFS channel is not enabled

[Kalle Valo]

Mohammed Shafi Shajakhan <mohammed at qti.qualcomm.com> wrote:
> From: Mohammed Shafi Shajakhan <mohammed at qti.qualcomm.com>
> 
> If DFS is not enabled in hostapd (ieee80211h=0) DFS channels shall
> not be available for use even though the hardware may have the capability
> to support DFS. With this configuration (DFS disabled in hostapd) trying to
> bring up ath10k device in DFS channel for AP mode fails and trying to
> simulate DFS in ath10k debugfs results in a warning in cfg80211 complaining
> invalid channel and this should be avoided in the driver itself rather than
> false propogating RADAR detection to mac80211/cfg80211. Fix this by
> checking for the first vif 'is_started' state(should work for client mode
> as well) as all the vifs shall be configured for the same channel
> 
> sys/kernel/debug/ieee80211/phy1/ath10k# echo 1 > dfs_simulate_radar
> 
> WARNING: at net/wireless/chan.c:265 cfg80211_radar_event+0x24/0x60
> Workqueue: phy0 ieee80211_dfs_radar_detected_work [mac80211]
> [<c022f2d4>] (warn_slowpath_null) from
> [<bf72dab8>] (cfg80211_radar_event+0x24/0x60 [cfg80211])
> [<bf72dab8>] (cfg80211_radar_event [cfg80211]) from
> [<bf7813e0>] (ieee80211_dfs_radar_detected_work+0x94/0xa0 [mac80211])
> [<bf7813e0>] (ieee80211_dfs_radar_detected_work [mac80211]) from
> [<c0242320>] (process_one_work+0x20c/0x32c)
> 
> WARNING: at net/wireless/nl80211.c:2488 nl80211_get_mpath+0x13c/0x4cc
>  Workqueue: phy0 ieee80211_dfs_radar_detected_work [mac80211]
> [<c022f2d4>] (warn_slowpath_null) from
> [<bf72dab8>] (cfg80211_radar_event+0x24/0x60 [cfg80211])
> [<bf72dab8>] (cfg80211_radar_event [cfg80211]) from
> [<bf7813e0>] (ieee80211_dfs_radar_detected_work+0x94/0xa0 [mac80211])
> [<bf7813e0>] (ieee80211_dfs_radar_detected_work [mac80211]) from
> [<c0242320>] (process_one_work+0x20c/0x32c)
> 
> Signed-off-by: Mohammed Shafi Shajakhan <mohammed at qti.qualcomm.com>

Patch applied to ath-next branch of ath.git, thanks.

ca07baab0b1e ath10k: disallow DFS simulation if DFS channel is not enabled

-- 
https://patchwork.kernel.org/patch/9587041/

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