ath9k: Add initial layout for an ath9k specific debugfs mechanism

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/debug.c b/drivers/net/wireless/ath9k/debug.c
index 31af7cc..c146e48 100644
--- a/drivers/net/wireless/ath9k/debug.c
+++ b/drivers/net/wireless/ath9k/debug.c
@@ -24,7 +24,7 @@
 	if (!sc)
 		return;
 
-	if (sc->sc_debug & dbg_mask) {
+	if (sc->sc_debug.debug_mask & dbg_mask) {
 		va_list args;
 
 		va_start(args, fmt);
@@ -34,7 +34,27 @@
 	}
 }
 
-void ath9k_init_debug(struct ath_softc *sc)
+int ath9k_init_debug(struct ath_softc *sc)
 {
-	sc->sc_debug = ath9k_debug;
+	sc->sc_debug.debug_mask = ath9k_debug;
+
+	sc->sc_debug.debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
+	if (!sc->sc_debug.debugfs_root)
+		goto err;
+
+	sc->sc_debug.debugfs_phy = debugfs_create_dir(wiphy_name(sc->hw->wiphy),
+						      sc->sc_debug.debugfs_root);
+	if (!sc->sc_debug.debugfs_phy)
+		goto err;
+
+	return 0;
+err:
+	ath9k_exit_debug(sc);
+	return -ENOMEM;
+}
+
+void ath9k_exit_debug(struct ath_softc *sc)
+{
+	debugfs_remove(sc->sc_debug.debugfs_phy);
+	debugfs_remove(sc->sc_debug.debugfs_root);
 }