USB: musb: clean up debugfs file and directory creation

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.

Because of this, lots of init functions do not need to have return
values, so this cleans up a lot of unused error handling code that never
could have triggered in the past.

Cc: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

4 files changed, 11 insertions, 52 deletions

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 5cc64980058b..b7d56272f9d1 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -2387,9 +2387,7 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
 	if (status < 0)
 		goto fail3;
 
-	status = musb_init_debugfs(musb);
-	if (status < 0)
-		goto fail4;
+	musb_init_debugfs(musb);
 
 	status = sysfs_create_group(&musb->controller->kobj, &musb_attr_group);
 	if (status)
@@ -2404,7 +2402,6 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
 fail5:
 	musb_exit_debugfs(musb);
 
-fail4:
 	musb_gadget_cleanup(musb);
 	musb_host_cleanup(musb);
 
diff --git a/drivers/usb/musb/musb_debug.h b/drivers/usb/musb/musb_debug.h
index 5e0f079dde21..c444a80fe1da 100644
--- a/drivers/usb/musb/musb_debug.h
+++ b/drivers/usb/musb/musb_debug.h
@@ -20,12 +20,11 @@
 void musb_dbg(struct musb *musb, const char *fmt, ...);
 
 #ifdef CONFIG_DEBUG_FS
-int musb_init_debugfs(struct musb *musb);
+void musb_init_debugfs(struct musb *musb);
 void musb_exit_debugfs(struct musb *musb);
 #else
-static inline int musb_init_debugfs(struct musb *musb)
+static inline void musb_init_debugfs(struct musb *musb)
 {
-	return 0;
 }
 static inline void musb_exit_debugfs(struct musb *musb)
 {
diff --git a/drivers/usb/musb/musb_debugfs.c b/drivers/usb/musb/musb_debugfs.c
index e2050cac3eae..f42858e2b54c 100644
--- a/drivers/usb/musb/musb_debugfs.c
+++ b/drivers/usb/musb/musb_debugfs.c
@@ -321,48 +321,18 @@ static const struct file_operations musb_softconnect_fops = {
 	.release		= single_release,
 };
 
-int musb_init_debugfs(struct musb *musb)
+void musb_init_debugfs(struct musb *musb)
 {
-	struct dentry		*root;
-	struct dentry		*file;
-	int			ret;
+	struct dentry *root;
 
 	root = debugfs_create_dir(dev_name(musb->controller), NULL);
-	if (!root) {
-		ret = -ENOMEM;
-		goto err0;
-	}
-
-	file = debugfs_create_file("regdump", S_IRUGO, root, musb,
-			&musb_regdump_fops);
-	if (!file) {
-		ret = -ENOMEM;
-		goto err1;
-	}
-
-	file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR,
-			root, musb, &musb_test_mode_fops);
-	if (!file) {
-		ret = -ENOMEM;
-		goto err1;
-	}
-
-	file = debugfs_create_file("softconnect", S_IRUGO | S_IWUSR,
-			root, musb, &musb_softconnect_fops);
-	if (!file) {
-		ret = -ENOMEM;
-		goto err1;
-	}
-
 	musb->debugfs_root = root;
 
-	return 0;
-
-err1:
-	debugfs_remove_recursive(root);
-
-err0:
-	return ret;
+	debugfs_create_file("regdump", S_IRUGO, root, musb, &musb_regdump_fops);
+	debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, musb,
+			    &musb_test_mode_fops);
+	debugfs_create_file("softconnect", S_IRUGO | S_IWUSR, root, musb,
+			    &musb_softconnect_fops);
 }
 
 void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb)
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index cfe6bfcbeb5d..fb871eabcc10 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -399,24 +399,17 @@ out:
 static int dsps_musb_dbg_init(struct musb *musb, struct dsps_glue *glue)
 {
 	struct dentry *root;
-	struct dentry *file;
 	char buf[128];
 
 	sprintf(buf, "%s.dsps", dev_name(musb->controller));
 	root = debugfs_create_dir(buf, NULL);
-	if (!root)
-		return -ENOMEM;
 	glue->dbgfs_root = root;
 
 	glue->regset.regs = dsps_musb_regs;
 	glue->regset.nregs = ARRAY_SIZE(dsps_musb_regs);
 	glue->regset.base = musb->ctrl_base;
 
-	file = debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset);
-	if (!file) {
-		debugfs_remove_recursive(root);
-		return -ENOMEM;
-	}
+	debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset);
 	return 0;
 }