qcacmn: Remove NOL channels from the scan channel list sent
Consider a WDS Repeater(RE) connected to the Root on a DFS channel and
reverse CSA is enabled. When RE detects radar, it adds the radar infected
channel to its NOL list and it informs the Root of the radar detect. Let
the target channel chosen by the Root be a DFS channel.The RE on receiving
the RCSA, brings down the STA vap and begins to scan again.
The scan is initiated from the supplicant (wlan_cfg80211_scan) and it
provides all the supported channels including the NOL channels.
(supplicant is unaware of the radar detect and NOL channels).
As the scan channel list sent to the FW includes NOL channels, FW reports
DFS SCAN VIOLATION and all DFS channels are blocked in RE.
The supplicant keeps sending the same scan list but scan is never
successful and thus the RE does not connect back to the Root.
To fix the DFS violation, remove the NOL channel(s) from the scan channel
list before sending the list to the FW.
Change-Id: I62090e381c11fab78ab1ee920da77f3603f48eaf
CRs-Fixed: 2405532
1 file changed