USB: typec: fsusb302: no need to check return value of debugfs_create_dir()

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.

Clean up the fsusb302 driver to not care if the root directory was
created, as the code should work properly either way.

Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/typec/fusb302/fusb302.c b/drivers/usb/typec/fusb302/fusb302.c
index 9c1eba9ea00483d1b62d7ff184d45be08692f66a..1e68da10bf17696be5c9232c0837a8706dd749ca 100644 (file)
--- a/drivers/usb/typec/fusb302/fusb302.c
+++ b/drivers/usb/typec/fusb302/fusb302.c
@@ -215,20 +215,15 @@ DEFINE_SHOW_ATTRIBUTE(fusb302_debug);
 
 static struct dentry *rootdir;
 
-static int fusb302_debugfs_init(struct fusb302_chip *chip)
+static void fusb302_debugfs_init(struct fusb302_chip *chip)
 {
        mutex_init(&chip->logbuffer_lock);
-       if (!rootdir) {
+       if (!rootdir)
                rootdir = debugfs_create_dir("fusb302", NULL);
-               if (!rootdir)
-                       return -ENOMEM;
-       }
 
        chip->dentry = debugfs_create_file(dev_name(chip->dev),
                                           S_IFREG | 0444, rootdir,
                                           chip, &fusb302_debug_fops);
-
-       return 0;
 }
 
 static void fusb302_debugfs_exit(struct fusb302_chip *chip)
@@ -241,7 +236,7 @@ static void fusb302_debugfs_exit(struct fusb302_chip *chip)
 
 static void fusb302_log(const struct fusb302_chip *chip,
                        const char *fmt, ...) { }
-static int fusb302_debugfs_init(const struct fusb302_chip *chip) { return 0; }
+static void fusb302_debugfs_init(const struct fusb302_chip *chip) { }
 static void fusb302_debugfs_exit(const struct fusb302_chip *chip) { }
 
 #endif
@@ -1773,9 +1768,7 @@ static int fusb302_probe(struct i2c_client *client,
                        return -EPROBE_DEFER;
        }
 
-       ret = fusb302_debugfs_init(chip);
-       if (ret < 0)
-               return ret;
+       fusb302_debugfs_init(chip);
 
        chip->wq = create_singlethread_workqueue(dev_name(chip->dev));
        if (!chip->wq) {