USB: Fix debugfs_create_file's error checking method for usb/gadget/s3c2410_udc

debugfs_create_file() returns NULL if an error occurs, returns -ENODEV
when debugfs is not enabled in the kernel.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 5 deletions

diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
index 48f51b12d2e2..00ba06b44752 100644
--- a/drivers/usb/gadget/s3c2410_udc.c
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -1894,11 +1894,8 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
                 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
                                 s3c2410_udc_debugfs_root,
                                 udc, &s3c2410_udc_debugfs_fops);
-                if (IS_ERR(udc->regs_info)) {
-                        dev_warn(dev, "debugfs file creation failed %ld\n",
-                                 PTR_ERR(udc->regs_info));
-                        udc->regs_info = NULL;
-                }
+                if (!udc->regs_info)
+                        dev_warn(dev, "debugfs file creation failed\n");
         }
 
         dev_dbg(dev, "probe ok\n");