ath9k: Check for root debugfs file

Creation of the root debugfs file could have failed
for some reason, check properly before proceeding in this
case.

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 fdf9528fa49b7282adff4acfdc6874a75fce513e..97df20cbf528fd5230ba5dd11bf67beb82e4b582 100644 (file)
--- a/drivers/net/wireless/ath9k/debug.c
+++ b/drivers/net/wireless/ath9k/debug.c
@@ -498,6 +498,9 @@ int ath9k_init_debug(struct ath_softc *sc)
 {
        sc->debug.debug_mask = ath9k_debug;
 
+       if (!ath9k_debugfs_root)
+               return -ENOENT;
+
        sc->debug.debugfs_phy = debugfs_create_dir(wiphy_name(sc->hw->wiphy),
                                                      ath9k_debugfs_root);
        if (!sc->debug.debugfs_phy)