wl1251: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: linux-wireless@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ti/wl1251/debugfs.c

@@ -54,11 +54,6 @@ static const struct file_operations name## _ops = {			\
 #define DEBUGFS_ADD(name, parent)					\
 	wl->debugfs.name = debugfs_create_file(#name, 0400, parent,	\
 					       wl, &name## _ops);	\
-	if (IS_ERR(wl->debugfs.name)) {					\
-		ret = PTR_ERR(wl->debugfs.name);			\
-		wl->debugfs.name = NULL;				\
-		goto out;						\
-	}
 
 #define DEBUGFS_DEL(name)						\
 	do {								\
@@ -354,10 +349,8 @@ static void wl1251_debugfs_delete_files(struct wl1251 *wl)
 	DEBUGFS_DEL(excessive_retries);
 }
 
-static int wl1251_debugfs_add_files(struct wl1251 *wl)
+static void wl1251_debugfs_add_files(struct wl1251 *wl)
 {
-	int ret = 0;
-
 	DEBUGFS_FWSTATS_ADD(tx, internal_desc_overflow);
 
 	DEBUGFS_FWSTATS_ADD(rx, out_of_mem);
@@ -453,12 +446,6 @@ static int wl1251_debugfs_add_files(struct wl1251 *wl)
 	DEBUGFS_ADD(tx_queue_status, wl->debugfs.rootdir);
 	DEBUGFS_ADD(retry_count, wl->debugfs.rootdir);
 	DEBUGFS_ADD(excessive_retries, wl->debugfs.rootdir);
-
-out:
-	if (ret < 0)
-		wl1251_debugfs_delete_files(wl);
-
-	return ret;
 }
 
 void wl1251_debugfs_reset(struct wl1251 *wl)
@@ -471,56 +458,20 @@ void wl1251_debugfs_reset(struct wl1251 *wl)
 
 int wl1251_debugfs_init(struct wl1251 *wl)
 {
-	int ret;
+	wl->stats.fw_stats = kzalloc(sizeof(*wl->stats.fw_stats), GFP_KERNEL);
+	if (!wl->stats.fw_stats)
+		return -ENOMEM;
 
 	wl->debugfs.rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 
-	if (IS_ERR(wl->debugfs.rootdir)) {
-		ret = PTR_ERR(wl->debugfs.rootdir);
-		wl->debugfs.rootdir = NULL;
-		goto err;
-	}
-
 	wl->debugfs.fw_statistics = debugfs_create_dir("fw-statistics",
 						       wl->debugfs.rootdir);
 
-	if (IS_ERR(wl->debugfs.fw_statistics)) {
-		ret = PTR_ERR(wl->debugfs.fw_statistics);
-		wl->debugfs.fw_statistics = NULL;
-		goto err_root;
-	}
-
-	wl->stats.fw_stats = kzalloc(sizeof(*wl->stats.fw_stats),
-				      GFP_KERNEL);
-
-	if (!wl->stats.fw_stats) {
-		ret = -ENOMEM;
-		goto err_fw;
-	}
-
 	wl->stats.fw_stats_update = jiffies;
 
-	ret = wl1251_debugfs_add_files(wl);
-
-	if (ret < 0)
-		goto err_file;
+	wl1251_debugfs_add_files(wl);
 
 	return 0;
-
-err_file:
-	kfree(wl->stats.fw_stats);
-	wl->stats.fw_stats = NULL;
-
-err_fw:
-	debugfs_remove(wl->debugfs.fw_statistics);
-	wl->debugfs.fw_statistics = NULL;
-
-err_root:
-	debugfs_remove(wl->debugfs.rootdir);
-	wl->debugfs.rootdir = NULL;
-
-err:
-	return ret;
 }
 
 void wl1251_debugfs_exit(struct wl1251 *wl)