On 05/31/2018 04:08 AM, Greg Kroah-Hartman wrote:
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@xxxxxxxxxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Hans de Goede <hdegoede@xxxxxxxxxx>
Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Adam Thomson <Adam.Thomson.Opensource@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
v2: changes based on review from Guenter, we still need to keep
chip->dentry and the removal of the rootdir is properly reference
counted, making this patch a lot smaller.
drivers/usb/typec/fusb302/fusb302.c | 15 ++++-----------
1 file changed, 4 insertions(+), 11 deletions(-)
diff --git a/drivers/usb/typec/fusb302/fusb302.c b/drivers/usb/typec/fusb302/fusb302.c
index 9c1eba9ea004..1e68da10bf17 100644
--- 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) {
--
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