qtnfmac: request userspace to do OBSS scanning if FW can not

[ Upstream commit 92246b12 ]

In case firmware reports that it can not do OBSS scanning for 40MHz
2.4GHz channels itself, tell userpsace to do that instead by setting
NL80211_FEATURE_NEED_OBSS_SCAN flag.
Signed-off-by: Igor mitsyanko <igor.mitsyanko.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/net/wireless/quantenna/qtnfmac/cfg80211.c

@@ -1109,6 +1109,9 @@ int qtnf_wiphy_register(struct qtnf_hw_info *hw_info, struct qtnf_wmac *mac)
 	if (hw_info->hw_capab & QLINK_HW_CAPAB_SCAN_RANDOM_MAC_ADDR)
 		wiphy->features |= NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
 
+	if (!(hw_info->hw_capab & QLINK_HW_CAPAB_OBSS_SCAN))
+		wiphy->features |= NL80211_FEATURE_NEED_OBSS_SCAN;
+
 #ifdef CONFIG_PM
 	if (macinfo->wowlan)
 		wiphy->wowlan = macinfo->wowlan;

drivers/net/wireless/quantenna/qtnfmac/qlink.h

@@ -71,6 +71,7 @@ struct qlink_msg_header {
  * @QLINK_HW_CAPAB_DFS_OFFLOAD: device implements DFS offload functionality
  * @QLINK_HW_CAPAB_SCAN_RANDOM_MAC_ADDR: device supports MAC Address
  *	Randomization in probe requests.
+ * @QLINK_HW_CAPAB_OBSS_SCAN: device can perform OBSS scanning.
  */
 enum qlink_hw_capab {
 	QLINK_HW_CAPAB_REG_UPDATE		= BIT(0),
@@ -78,6 +79,7 @@ enum qlink_hw_capab {
 	QLINK_HW_CAPAB_DFS_OFFLOAD		= BIT(2),
 	QLINK_HW_CAPAB_SCAN_RANDOM_MAC_ADDR	= BIT(3),
 	QLINK_HW_CAPAB_PWR_MGMT			= BIT(4),
+	QLINK_HW_CAPAB_OBSS_SCAN		= BIT(5),
 };
 
 enum qlink_iface_type {