usb: dwc3: debugfs: fix error check

debugfs APIs will return NULL if it fails
to create the file/directory we ask it to
create.

Instead of checking for IS_ERR(ptr) we must
check for !ptr.

Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
index a2c1cc6..78ec092 100644 (file)
--- a/drivers/usb/dwc3/debugfs.c
+++ b/drivers/usb/dwc3/debugfs.c
@@ -659,8 +659,8 @@ int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
        int                     ret;
 
        root = debugfs_create_dir(dev_name(dwc->dev), NULL);
-       if (IS_ERR(root)) {
-               ret = PTR_ERR(root);
+       if (!root) {
+               ret = -ENOMEM;
                goto err0;
        }
 
@@ -668,29 +668,29 @@ int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
 
        file = debugfs_create_file("regdump", S_IRUGO, root, dwc,
                        &dwc3_regdump_fops);
-       if (IS_ERR(file)) {
-               ret = PTR_ERR(file);
+       if (!file) {
+               ret = -ENOMEM;
                goto err1;
        }
 
        file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
                        dwc, &dwc3_mode_fops);
-       if (IS_ERR(file)) {
-               ret = PTR_ERR(file);
+       if (!file) {
+               ret = -ENOMEM;
                goto err1;
        }
 
        file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root,
                        dwc, &dwc3_testmode_fops);
-       if (IS_ERR(file)) {
-               ret = PTR_ERR(file);
+       if (!file) {
+               ret = -ENOMEM;
                goto err1;
        }
 
        file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root,
                        dwc, &dwc3_link_state_fops);
-       if (IS_ERR(file)) {
-               ret = PTR_ERR(file);
+       if (!file) {
+               ret = -ENOMEM;
                goto err1;
        }