From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Tue, 18 Jun 2019 15:58:30 +0000 (+0200)
Subject: watchdog: mei_wdt: no need to check return value of debugfs_create functions
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=64079cf9f2b2f93779c1d9772d0e1f5c04bd4d22;p=openwrt%2Fstaging%2Fblogic.git

watchdog: mei_wdt: 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: Tomas Winkler <tomas.winkler@intel.com>
Cc: Wim Van Sebroeck <wim@linux-watchdog.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: linux-watchdog@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
---

diff --git a/drivers/watchdog/mei_wdt.c b/drivers/watchdog/mei_wdt.c
index 099f6305039d..5391bf3e6b11 100644
--- a/drivers/watchdog/mei_wdt.c
+++ b/drivers/watchdog/mei_wdt.c
@@ -537,38 +537,23 @@ static void dbgfs_unregister(struct mei_wdt *wdt)
 	wdt->dbgfs_dir = NULL;
 }
 
-static int dbgfs_register(struct mei_wdt *wdt)
+static void dbgfs_register(struct mei_wdt *wdt)
 {
-	struct dentry *dir, *f;
+	struct dentry *dir;
 
 	dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
-	if (!dir)
-		return -ENOMEM;
-
 	wdt->dbgfs_dir = dir;
-	f = debugfs_create_file("state", S_IRUSR, dir, wdt, &dbgfs_fops_state);
-	if (!f)
-		goto err;
 
-	f = debugfs_create_file("activation",  S_IRUSR,
-				dir, wdt, &dbgfs_fops_activation);
-	if (!f)
-		goto err;
+	debugfs_create_file("state", S_IRUSR, dir, wdt, &dbgfs_fops_state);
 
-	return 0;
-err:
-	dbgfs_unregister(wdt);
-	return -ENODEV;
+	debugfs_create_file("activation", S_IRUSR, dir, wdt,
+			    &dbgfs_fops_activation);
 }
 
 #else
 
 static inline void dbgfs_unregister(struct mei_wdt *wdt) {}
-
-static inline int dbgfs_register(struct mei_wdt *wdt)
-{
-	return 0;
-}
+static inline void dbgfs_register(struct mei_wdt *wdt) {}
 #endif /* CONFIG_DEBUG_FS */
 
 static int mei_wdt_probe(struct mei_cl_device *cldev,
@@ -621,8 +606,7 @@ static int mei_wdt_probe(struct mei_cl_device *cldev,
 	if (ret)
 		goto err_disable;
 
-	if (dbgfs_register(wdt))
-		dev_warn(&cldev->dev, "cannot register debugfs\n");
+	dbgfs_register(wdt);
 
 	return 0;