wifi: mac80211: add ieee80211_vif_link_active() helper

We sometimes need to check if a link is active, and this
is complicated by the fact that active_links has no bits
set when the vif isn't (acting as) an MLD. Add a small
new helper ieee80211_vif_link_active() to make that a bit
easier, and use it in a few places.

type=cleanup
ticket=none

Change-Id: I06892a503f5ecb9563fbd678d35d08daf7a044b0
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-on: https://gerritwcs.ir.intel.com/c/iwlwifi-stack-dev/+/94203
Tested-by: iil_jenkins iil_jenkins <EC.GER.UNIX.IIL.JENKINS@INTEL.COM>
automatic-review: iil_jenkins iil_jenkins <EC.GER.UNIX.IIL.JENKINS@INTEL.COM>
tested: iil_jenkins iil_jenkins <EC.GER.UNIX.IIL.JENKINS@INTEL.COM>
Reviewed-by: Ilan Peer <ilan.peer@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
x-iwlwifi-stack-dev: 3d68a17c2997374ddda778245f53e6fac4bf43b2

6 files changed, 24 insertions, 16 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 2cf92034e2..5c2e30f781 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2027,6 +2027,21 @@ static inline bool ieee80211_vif_is_mld(const struct ieee80211_vif *vif)
 	return vif->valid_links != 0;
 }
 
+/**
+ * ieee80211_vif_link_active - check if a given link is active
+ * @vif: the vif
+ * @link_id: the link ID to check
+ * Return: %true if the vif is an MLD and the link is active, or if
+ *	the vif is not an MLD and the link ID is 0; %false otherwise.
+ */
+static inline bool ieee80211_vif_link_active(const struct ieee80211_vif *vif,
+					     unsigned int link_id)
+{
+	if (!ieee80211_vif_is_mld(vif))
+		return link_id == 0;
+	return vif->active_links & BIT(link_id);
+}
+
 #define for_each_vif_active_link(vif, link, link_id)				\
 	for (link_id = 0; link_id < ARRAY_SIZE((vif)->link_conf); link_id++)	\
 		if ((!(vif)->active_links ||					\
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 243457e75d..70fa626182 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -3155,8 +3155,7 @@ int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
 	if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
 		return -EINVAL;
 
-	if (ieee80211_vif_is_mld(&sdata->vif) &&
-	    !(sdata->vif.active_links & BIT(link->link_id)))
+	if (!ieee80211_vif_link_active(&sdata->vif, link->link_id))
 		return 0;
 
 	old_req = link->u.mgd.req_smps;
diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index 38acdc458c..80e4b97841 100644
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -1701,8 +1701,7 @@ int ieee80211_link_use_channel(struct ieee80211_link_data *link,
 
 	lockdep_assert_wiphy(local->hw.wiphy);
 
-	if (sdata->vif.active_links &&
-	    !(sdata->vif.active_links & BIT(link->link_id))) {
+	if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) {
 		ieee80211_link_update_chanreq(link, chanreq);
 		return 0;
 	}
diff --git a/net/mac80211/driver-ops.c b/net/mac80211/driver-ops.c
index 3b7f70073f..dce37ba8eb 100644
--- a/net/mac80211/driver-ops.c
+++ b/net/mac80211/driver-ops.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright 2015 Intel Deutschland GmbH
- * Copyright (C) 2022-2023 Intel Corporation
+ * Copyright (C) 2022-2024 Intel Corporation
  */
 #include <net/mac80211.h>
 #include "ieee80211_i.h"
@@ -214,8 +214,7 @@ int drv_conf_tx(struct ieee80211_local *local,
 	if (!check_sdata_in_driver(sdata))
 		return -EIO;
 
-	if (sdata->vif.active_links &&
-	    !(sdata->vif.active_links & BIT(link->link_id)))
+	if (!ieee80211_vif_link_active(&sdata->vif, link->link_id))
 		return 0;
 
 	if (params->cw_min == 0 || params->cw_min > params->cw_max) {
@@ -315,8 +314,7 @@ int drv_assign_vif_chanctx(struct ieee80211_local *local,
 	if (!check_sdata_in_driver(sdata))
 		return -EIO;
 
-	if (sdata->vif.active_links &&
-	    !(sdata->vif.active_links & BIT(link_conf->link_id)))
+	if (!ieee80211_vif_link_active(&sdata->vif, link_conf->link_id))
 		return 0;
 
 	trace_drv_assign_vif_chanctx(local, sdata, link_conf, ctx);
@@ -343,8 +341,7 @@ void drv_unassign_vif_chanctx(struct ieee80211_local *local,
 	if (!check_sdata_in_driver(sdata))
 		return;
 
-	if (sdata->vif.active_links &&
-	    !(sdata->vif.active_links & BIT(link_conf->link_id)))
+	if (!ieee80211_vif_link_active(&sdata->vif, link_conf->link_id))
 		return;
 
 	trace_drv_unassign_vif_chanctx(local, sdata, link_conf, ctx);
@@ -461,8 +458,7 @@ void drv_link_info_changed(struct ieee80211_local *local,
 	if (!check_sdata_in_driver(sdata))
 		return;
 
-	if (sdata->vif.active_links &&
-	    !(sdata->vif.active_links & BIT(link_id)))
+	if (!ieee80211_vif_link_active(&sdata->vif, link_id))
 		return;
 
 	trace_drv_link_info_changed(local, sdata, info, changed);
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 627bd5a8bd..d7c4d16232 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1935,8 +1935,7 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 		for (link_id = 0;
 		     link_id < ARRAY_SIZE(sdata->vif.link_conf);
 		     link_id++) {
-			if (ieee80211_vif_is_mld(&sdata->vif) &&
-			    !(sdata->vif.active_links & BIT(link_id)))
+			if (!ieee80211_vif_link_active(&sdata->vif, link_id))
 				continue;
 
 			link = sdata_dereference(sdata->link[link_id], sdata);
diff --git a/versions b/versions
index ba39416c23..5d53a52715 100644
--- a/versions
+++ b/versions
@@ -2,4 +2,4 @@ BACKPORTS_VERSION="(see git)"
 BACKPORTED_KERNEL_VERSION="(see git)"
 BACKPORTED_KERNEL_NAME="iwlwifi"
 BACKPORTS_BUILD_TSTAMP=__DATE__ \" \" __TIME__
-BACKPORTS_GIT_TRACKED="iwlwifi-stack-public:master:11885:b9eab260"
+BACKPORTS_GIT_TRACKED="iwlwifi-stack-public:master:11886:3d68a17c"