iwl3945: add debugfs to 3945

Patch adds debugfs to 3945. Also fix debugfs registration in iwlagn
to return error code if it fails.

Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index c15d0cf..bcfe199 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -4346,6 +4346,10 @@
 	if (err)
 		goto  out_remove_sysfs;
 
+	err = iwl_dbgfs_register(priv, DRV_NAME);
+	if (err)
+		IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
+
 	err = iwl_rfkill_init(priv);
 	if (err)
 		IWL_ERR(priv, "Unable to initialize RFKILL system. "
@@ -4396,6 +4400,8 @@
 
 	IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
 
+	iwl_dbgfs_unregister(priv);
+
 	set_bit(STATUS_EXIT_PENDING, &priv->status);
 
 	if (priv->mac80211_registered) {