wifi: iwlwifi: Fix dentry reference leak in iwl_mld_add_link_debugfs

The debugfs_lookup() function increases the dentry reference count.
Add missing dput() call to release the reference when the "iwlmld"
directory already exists.

Fixes: d1e879e ("wifi: iwlwifi: add iwlmld sub-driver")
Cc: [email protected]
Signed-off-by: Miaoqian Lin <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Miri Korenblit <[email protected]>

Author: Yuuoniy

drivers/net/wireless/intel/iwlwifi/mld/debugfs.c

@@ -1001,8 +1001,12 @@ void iwl_mld_add_link_debugfs(struct ieee80211_hw *hw,
 	 * If not, this is a per-link dir of a MLO vif, add in it the iwlmld
 	 * dir.
 	 */
-	if (!mld_link_dir)
+	if (!mld_link_dir) {
 		mld_link_dir = debugfs_create_dir("iwlmld", dir);
+	} else {
+		/* Release the reference from debugfs_lookup */
+		dput(mld_link_dir);
+	}
 }
 
 static ssize_t _iwl_dbgfs_fixed_rate_write(struct iwl_mld *mld, char *buf,