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USB: fotg210-hcd: no need to check return value of debugfs_create functions

PATCH New Greg Kroah-Hartman 1 participant 1 message May 29, 2018 USB

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Greg Kroah-Hartman

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PATCH 10/22 USB: fotg210-hcd: 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 Felipe Balbi <[email protected]>
Cc Alan Stern <[email protected]>
Cc Johan Hovold <[email protected]>
Cc Kuppuswamy Sathyanarayanan <[email protected]>
Cc Vasyl Gomonovych <[email protected]>
Cc Mariusz Skamra <[email protected]>
Cc "Gustavo A. R. Silva" <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 drivers/usb/host/fotg210-hcd.c | 34 +++++++++-------------------------
 1 file changed, 9 insertions(+), 25 deletions(-)
drivers/usb/host/fotg210-hcd.c +9 -25
index d8abf401918a..e64eb47770c8 100644
@@ -844,28 +844,16 @@ static int debug_registers_open(struct inode *inode, struct file *file)
 static inline void create_debug_files(struct fotg210_hcd *fotg210)
 {
 	struct usb_bus *bus = &fotg210_to_hcd(fotg210)->self;
+	struct dentry *root;
 
-	fotg210->debug_dir = debugfs_create_dir(bus->bus_name,
-			fotg210_debug_root);
-	if (!fotg210->debug_dir)
-		return;
-
-	if (!debugfs_create_file("async", S_IRUGO, fotg210->debug_dir, bus,
-			&debug_async_fops))
-		goto file_error;
-
-	if (!debugfs_create_file("periodic", S_IRUGO, fotg210->debug_dir, bus,
-			&debug_periodic_fops))
-		goto file_error;
+	root = debugfs_create_dir(bus->bus_name, fotg210_debug_root);
+	fotg210->debug_dir = root;
 
-	if (!debugfs_create_file("registers", S_IRUGO, fotg210->debug_dir, bus,
-			&debug_registers_fops))
-		goto file_error;
-
-	return;
-
-file_error:
-	debugfs_remove_recursive(fotg210->debug_dir);
+	debugfs_create_file("async", S_IRUGO, root, bus, &debug_async_fops);
+	debugfs_create_file("periodic", S_IRUGO, root, bus,
+			    &debug_periodic_fops);
+	debugfs_create_file("registers", S_IRUGO, root, bus,
+			    &debug_registers_fops);
 }
 
 static inline void remove_debug_files(struct fotg210_hcd *fotg210)

@@ -5686,10 +5674,6 @@ static int __init fotg210_hcd_init(void)
 			sizeof(struct fotg210_itd));
 
 	fotg210_debug_root = debugfs_create_dir("fotg210", usb_debug_root);
-	if (!fotg210_debug_root) {
-		retval = -ENOENT;
-		goto err_debug;
-	}
 
 	retval = platform_driver_register(&fotg210_hcd_driver);
 	if (retval < 0)

@@ -5699,7 +5683,7 @@ static int __init fotg210_hcd_init(void)
 clean:
 	debugfs_remove(fotg210_debug_root);
 	fotg210_debug_root = NULL;
-err_debug:
+
 	clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
 	return retval;
 }