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>

3 files changed, 42 insertions, 8 deletions

diff --git a/drivers/net/wireless/ath9k/core.h b/drivers/net/wireless/ath9k/core.h
index 44938793d6ef..5b755582b33e 100644
--- a/drivers/net/wireless/ath9k/core.h
+++ b/drivers/net/wireless/ath9k/core.h
@@ -88,8 +88,15 @@ enum ATH_DEBUG {
 
 #ifdef CONFIG_ATH9K_DEBUG
 
+struct ath9k_debug {
+        int debug_mask;
+        struct dentry *debugfs_root;
+        struct dentry *debugfs_phy;
+};
+
 void DPRINTF(struct ath_softc *sc, int dbg_mask, const char *fmt, ...);
-void ath9k_init_debug(struct ath_softc *sc);
+int ath9k_init_debug(struct ath_softc *sc);
+void ath9k_exit_debug(struct ath_softc *sc);
 
 #else
 
@@ -98,11 +105,16 @@ static inline void DPRINTF(struct ath_softc *sc, int dbg_mask,
 {
 }
 
-static inline ath9k_init_debug(struct ath_softc *sc)
+static inline int ath9k_init_debug(struct ath_softc *sc)
 {
+        return 0;
 }
 
-#endif
+static inline void ath9k_exit_debug(struct ath_softc *sc)
+{
+}
+
+#endif /* CONFIG_ATH9K_DEBUG */
 
 struct ath_config {
         u32 ath_aggr_prot;
@@ -619,7 +631,7 @@ struct ath_softc {
         u8 sc_bssidmask[ETH_ALEN];
 
 #ifdef CONFIG_ATH9K_DEBUG
-        int sc_debug;
+        struct ath9k_debug sc_debug;
 #endif
         u32 sc_intrstatus;
         u32 sc_flags; /* SC_OP_* */
diff --git a/drivers/net/wireless/ath9k/debug.c b/drivers/net/wireless/ath9k/debug.c
index 31af7cc0fa34..c146e484ef54 100644
--- a/drivers/net/wireless/ath9k/debug.c
+++ b/drivers/net/wireless/ath9k/debug.c
@@ -24,7 +24,7 @@ void DPRINTF(struct ath_softc *sc, int dbg_mask, const char *fmt, ...)
         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 DPRINTF(struct ath_softc *sc, int dbg_mask, const char *fmt, ...)
         }
 }
 
-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);
 }
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index 9e7045dd7334..71389643b1b1 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -1299,6 +1299,7 @@ static void ath_detach(struct ath_softc *sc)
                         ath_tx_cleanupq(sc, &sc->sc_txq[i]);
 
         ath9k_hw_detach(sc->sc_ah);
+        ath9k_exit_debug(sc);
 }
 
 static int ath_init(u16 devid, struct ath_softc *sc)
@@ -1311,7 +1312,8 @@ static int ath_init(u16 devid, struct ath_softc *sc)
         /* XXX: hardware will not be ready until ath_open() being called */
         sc->sc_flags |= SC_OP_INVALID;
 
-        ath9k_init_debug(sc);
+        if (ath9k_init_debug(sc) < 0)
+                printk(KERN_ERR "Unable to create debugfs files\n");
 
         spin_lock_init(&sc->sc_resetlock);
         tasklet_init(&sc->intr_tq, ath9k_tasklet, (unsigned long)sc);