usb: musb: debugfs: fix error check

debugfs will return NULL on failure, so
we must check for !ptr instead of IS_ERR(ptr).

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

diff --git a/drivers/usb/musb/musb_debugfs.c b/drivers/usb/musb/musb_debugfs.c
index 219d0fb..40a37c9 100644 (file)
--- a/drivers/usb/musb/musb_debugfs.c
+++ b/drivers/usb/musb/musb_debugfs.c
@@ -242,22 +242,22 @@ int __devinit musb_init_debugfs(struct musb *musb)
        int                     ret;
 
        root = debugfs_create_dir("musb", NULL);
-       if (IS_ERR(root)) {
-               ret = PTR_ERR(root);
+       if (!root) {
+               ret = -ENOMEM;
                goto err0;
        }
 
        file = debugfs_create_file("regdump", S_IRUGO, root, musb,
                        &musb_regdump_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, musb, &musb_test_mode_fops);
-       if (IS_ERR(file)) {
-               ret = PTR_ERR(file);
+       if (!file) {
+               ret = -ENOMEM;
                goto err1;
        }