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From:   gregory.greenman@intel.com
To:     johannes@sipsolutions.net
Cc:     linux-wireless@vger.kernel.org,
        Miri Korenblit <miriam.rachel.korenblit@intel.com>,
        Gregory Greenman <gregory.greenman@intel.com>
Subject: [PATCH 13/31] wifi: iwlwifi: mvm: modify link instead of removing it during csa
Date:   Tue, 28 Mar 2023 10:58:53 +0300
Message-Id: <20230328104948.c07ca7aace29.I4ed5c77f4afe1b5da19322734e2f84d51aa541ad@changeid>
In-Reply-To: <20230328075911.2370108-1-gregory.greenman@intel.com>
References: <20230328075911.2370108-1-gregory.greenman@intel.com>
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From: Miri Korenblit <miriam.rachel.korenblit@intel.com>

During CSA the PHY used by the link is changing, So the driver
needs to modify the links phy to the FW. Currently the driver is doing
it by removing the link and adding a new one with the new phy_id, but the
FW expects the link only to be modified. Fix this by modifying the links
phy_id instead of removing it and adding a new one

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
---
 .../wireless/intel/iwlwifi/mvm/mld-mac80211.c  | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c
index 33368e5945f4..5be8058ca669 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c
@@ -157,9 +157,16 @@ static int __iwl_mvm_mld_assign_vif_chanctx(struct iwl_mvm *mvm,
 						switching_chanctx, &ret))
 		goto out;
 
-	ret = iwl_mvm_add_link(mvm, vif);
-	if (ret)
-		goto out;
+	if (!switching_chanctx) {
+		ret = iwl_mvm_add_link(mvm, vif);
+		if (ret)
+			goto out;
+	} else {
+		ret = iwl_mvm_link_changed(mvm, vif, 0, false);
+		if (ret)
+			goto out_remove_link;
+	}
+
 	ret = iwl_mvm_link_changed(mvm, vif, LINK_CONTEXT_MODIFY_ACTIVE |
 				   LINK_CONTEXT_MODIFY_RATES_INFO,
 				   true);
@@ -219,10 +226,9 @@ static void __iwl_mvm_mld_unassign_vif_chanctx(struct iwl_mvm *mvm,
 	if (vif->type == NL80211_IFTYPE_MONITOR)
 		iwl_mvm_mld_rm_snif_sta(mvm, vif);
 
-	/* Link needs to be deactivated before removal */
 	iwl_mvm_link_changed(mvm, vif, LINK_CONTEXT_MODIFY_ACTIVE, false);
-	iwl_mvm_remove_link(mvm, vif);
-
+	if (!switching_chanctx)
+		iwl_mvm_remove_link(mvm, vif);
 out:
 	if (switching_chanctx)
 		return;
-- 
2.38.1