From d1ee2c1922566257cd6cc4ac7c21974d708fea62 Mon Sep 17 00:00:00 2001 From: Benjamin Berg Date: Sun, 20 Apr 2025 09:59:57 +0300 Subject: [PATCH] wifi: iwlwifi: mld: only create debugfs symlink if it does not exist When mac80211 switches between non-MLO and MLO it will recreate the debugfs directories. This results in the add_if_debugfs handler being called multiple times. As the convenience symlink is created in the mld debugfs directory and not the vif, it will not be removed by mac80211 when this happens and still exists. Add a check and only create the convenience symlink if we have not yet done so. Fixes: d1e879ec600f ("wifi: iwlwifi: add iwlmld sub-driver") Signed-off-by: Benjamin Berg Signed-off-by: Miri Korenblit Link: https://patch.msgid.link/20250420095642.2490696f032a.I74319c7cf18f7e16a3d331cb96e38504b9fbab66@changeid Signed-off-by: Johannes Berg --- drivers/net/wireless/intel/iwlwifi/mld/debugfs.c | 5 +++-- drivers/net/wireless/intel/iwlwifi/mld/mac80211.c | 1 + 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mld/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mld/debugfs.c index 89d95e9b4f30..93f9f78e4276 100644 --- a/drivers/net/wireless/intel/iwlwifi/mld/debugfs.c +++ b/drivers/net/wireless/intel/iwlwifi/mld/debugfs.c @@ -949,8 +949,9 @@ void iwl_mld_add_vif_debugfs(struct ieee80211_hw *hw, snprintf(name, sizeof(name), "%pd", vif->debugfs_dir); snprintf(target, sizeof(target), "../../../%pd3/iwlmld", vif->debugfs_dir); - mld_vif->dbgfs_slink = - debugfs_create_symlink(name, mld->debugfs_dir, target); + if (!mld_vif->dbgfs_slink) + mld_vif->dbgfs_slink = + debugfs_create_symlink(name, mld->debugfs_dir, target); if (iwlmld_mod_params.power_scheme != IWL_POWER_SCHEME_CAM && vif->type == NL80211_IFTYPE_STATION) { diff --git a/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c index 99e13cfd1e5f..68d97d3b8f02 100644 --- a/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c +++ b/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c @@ -651,6 +651,7 @@ void iwl_mld_mac80211_remove_interface(struct ieee80211_hw *hw, #ifdef CONFIG_IWLWIFI_DEBUGFS debugfs_remove(iwl_mld_vif_from_mac80211(vif)->dbgfs_slink); + iwl_mld_vif_from_mac80211(vif)->dbgfs_slink = NULL; #endif iwl_mld_rm_vif(mld, vif); -- 2.25.1