nl80211: allow multiple active scheduled scan requests

This patch implements the idea to have multiple scheduled scan requests
running concurrently. It mainly illustrates how to deal with the incoming
request from user-space in terms of backward compatibility. In order to
use multiple scheduled scans user-space needs to provide a flag attribute
NL80211_ATTR_SCHED_SCAN_MULTI to indicate support. If not the request is
treated as a legacy scan.

Drivers currently supporting scheduled scan are now indicating they support
a single scheduled scan request. This obsoletes WIPHY_FLAG_SUPPORTS_SCHED_SCAN.

Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
[clean up netlink destroy path to avoid allocations, code cleanups]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

5 files changed, 5 insertions, 5 deletions

diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c
index 0c118b7c362c..1906412afa70 100644
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -3973,7 +3973,7 @@ int ath6kl_cfg80211_init(struct ath6kl *ar)
 			    WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD;
 
 	if (test_bit(ATH6KL_FW_CAPABILITY_SCHED_SCAN_V2, ar->fw_capabilities))
-		ar->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
+		ar->wiphy->max_sched_scan_reqs = 1;
 
 	if (test_bit(ATH6KL_FW_CAPABILITY_INACTIVITY_TIMEOUT,
 		     ar->fw_capabilities))
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index 8c7f1ef288c6..c71173dc9965 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -6374,11 +6374,11 @@ err:
 static void brcmf_wiphy_pno_params(struct wiphy *wiphy)
 {
 	/* scheduled scan settings */
+	wiphy->max_sched_scan_reqs = 1;
 	wiphy->max_sched_scan_ssids = BRCMF_PNO_MAX_PFN_COUNT;
 	wiphy->max_match_sets = BRCMF_PNO_MAX_PFN_COUNT;
 	wiphy->max_sched_scan_ie_len = BRCMF_SCAN_IE_LEN_MAX;
 	wiphy->max_sched_scan_plan_interval = BRCMF_PNO_SCHED_SCAN_MAX_PERIOD;
-	wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index 5cdd95775ba6..8c58d47100a0 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -620,7 +620,7 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 	else
 		hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 
-	hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
+	hw->wiphy->max_sched_scan_reqs = 1;
 	hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 	hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 	/* we create the 802.11 header and zero length SSID IE. */
diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
index 49b4c805b7d5..9927bd5aac56 100644
--- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
@@ -4297,7 +4297,6 @@ int mwifiex_register_cfg80211(struct mwifiex_adapter *adapter)
 	wiphy->flags |= WIPHY_FLAG_HAVE_AP_SME |
 			WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD |
 			WIPHY_FLAG_AP_UAPSD |
-			WIPHY_FLAG_SUPPORTS_SCHED_SCAN |
 			WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
 			WIPHY_FLAG_HAS_CHANNEL_SWITCH |
 			WIPHY_FLAG_PS_ON_BY_DEFAULT;
@@ -4316,6 +4315,7 @@ int mwifiex_register_cfg80211(struct mwifiex_adapter *adapter)
 				    NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS2 |
 				    NL80211_PROBE_RESP_OFFLOAD_SUPPORT_P2P;
 
+	wiphy->max_sched_scan_reqs = 1;
 	wiphy->max_sched_scan_ssids = MWIFIEX_MAX_SSID_LIST_LENGTH;
 	wiphy->max_sched_scan_ie_len = MWIFIEX_MAX_VSIE_LEN;
 	wiphy->max_match_sets = MWIFIEX_MAX_SSID_LIST_LENGTH;
diff --git a/drivers/net/wireless/ti/wlcore/main.c b/drivers/net/wireless/ti/wlcore/main.c
index a21fda910529..382ec15ec1af 100644
--- a/drivers/net/wireless/ti/wlcore/main.c
+++ b/drivers/net/wireless/ti/wlcore/main.c
@@ -6128,6 +6128,7 @@ static int wl1271_init_ieee80211(struct wl1271 *wl)
 	wl->hw->wiphy->max_scan_ie_len = WL1271_CMD_TEMPL_MAX_SIZE -
 			sizeof(struct ieee80211_header);
 
+	wl->hw->wiphy->max_sched_scan_reqs = 1;
 	wl->hw->wiphy->max_sched_scan_ie_len = WL1271_CMD_TEMPL_MAX_SIZE -
 		sizeof(struct ieee80211_header);
 
@@ -6135,7 +6136,6 @@ static int wl1271_init_ieee80211(struct wl1271 *wl)
 
 	wl->hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD |
 				WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
-				WIPHY_FLAG_SUPPORTS_SCHED_SCAN |
 				WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 
 	wl->hw->wiphy->features |= NL80211_FEATURE_AP_SCAN;