diff mbox

[16/22] USB: dwc3: no need to check return value of debugfs_create functions

Message ID 20180529153107.12791-16-gregkh@linuxfoundation.org (mailing list archive)
State New, archived
Headers show

Commit Message

Greg KH May 29, 2018, 3:31 p.m. UTC 
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 <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/dwc3/debugfs.c | 43 ++++++++++----------------------------
 1 file changed, 11 insertions(+), 32 deletions(-)

Comments

Felipe Balbi May 31, 2018, 10:06 a.m. UTC | #1 
Hi,

Greg Kroah-Hartman <gregkh@linuxfoundation.org> writes:
> 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 <balbi@kernel.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
diff mbox

Patch

diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
index 2f07be1e1f31..df8e73ec3342 100644
--- a/drivers/usb/dwc3/debugfs.c
+++ b/drivers/usb/dwc3/debugfs.c
@@ -716,9 +716,6 @@  static void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep,
 	struct dentry		*dir;
 
 	dir = debugfs_create_dir(dep->name, parent);
-	if (IS_ERR_OR_NULL(dir))
-		return;
-
 	dwc3_debugfs_create_endpoint_files(dep, dir);
 }
 
@@ -740,49 +737,31 @@  static void dwc3_debugfs_create_endpoint_dirs(struct dwc3 *dwc,
 void dwc3_debugfs_init(struct dwc3 *dwc)
 {
 	struct dentry		*root;
-	struct dentry           *file;
-
-	root = debugfs_create_dir(dev_name(dwc->dev), NULL);
-	if (IS_ERR_OR_NULL(root)) {
-		if (!root)
-			dev_err(dwc->dev, "Can't create debugfs root\n");
-		return;
-	}
-	dwc->root = root;
 
 	dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
-	if (!dwc->regset) {
-		debugfs_remove_recursive(root);
+	if (!dwc->regset)
 		return;
-	}
 
 	dwc->regset->regs = dwc3_regs;
 	dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
 	dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START;
 
-	file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
-	if (!file)
-		dev_dbg(dwc->dev, "Can't create debugfs regdump\n");
+	root = debugfs_create_dir(dev_name(dwc->dev), NULL);
+	dwc->root = root;
+
+	debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
 
 	if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
-		file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
-				dwc, &dwc3_mode_fops);
-		if (!file)
-			dev_dbg(dwc->dev, "Can't create debugfs mode\n");
+		debugfs_create_file("mode", S_IRUGO | S_IWUSR, root, dwc,
+				    &dwc3_mode_fops);
 	}
 
 	if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
 			IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
-		file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root,
-				dwc, &dwc3_testmode_fops);
-		if (!file)
-			dev_dbg(dwc->dev, "Can't create debugfs testmode\n");
-
-		file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR,
-				root, dwc, &dwc3_link_state_fops);
-		if (!file)
-			dev_dbg(dwc->dev, "Can't create debugfs link_state\n");
-
+		debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, dwc,
+				    &dwc3_testmode_fops);
+		debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root, dwc,
+				    &dwc3_link_state_fops);
 		dwc3_debugfs_create_endpoint_dirs(dwc, root);
 	}
 }