USB: iowarrior: fix misuse of return value of copy_to_user()

copy_to_user() returns number of not copied bytes, not error code.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c
index 2de49c8887c5..bc88c79875a1 100644
--- a/drivers/usb/misc/iowarrior.c
+++ b/drivers/usb/misc/iowarrior.c
@@ -542,7 +542,7 @@ static long iowarrior_ioctl(struct file *file, unsigned int cmd,
                         retval = io_res;
                 else {
                         io_res = copy_to_user(user_buffer, buffer, dev->report_size);
-                        if (io_res < 0)
+                        if (io_res)
                                 retval = -EFAULT;
                 }
                 break;
@@ -574,7 +574,7 @@ static long iowarrior_ioctl(struct file *file, unsigned int cmd,
                         }
                         io_res = copy_to_user((struct iowarrior_info __user *)arg, &info,
                                          sizeof(struct iowarrior_info));
-                        if (io_res < 0)
+                        if (io_res)
                                 retval = -EFAULT;
                         break;
                 }