usb: core: message: remember to reset 'ret' to 0 when necessary

usb_control_msg() will return the amount of bytes transferred, if that
amount matches what we wanted to transfer, we need to reset 'ret' to 0
from usb_get_status().

Fixes: 2e43f0fe ("usb: core: add a 'type' parameter to usb_get_status()")
Reported-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/core/message.c

@@ -975,6 +975,7 @@ int usb_get_status(struct usb_device *dev, int recip, int type, int target,
 		}
 
 		*(u32 *) data = le32_to_cpu(*(__le32 *) status);
+		ret = 0;
 		break;
 	case 2:
 		if (type != USB_STATUS_TYPE_STANDARD) {
@@ -983,6 +984,7 @@ int usb_get_status(struct usb_device *dev, int recip, int type, int target,
 		}
 
 		*(u16 *) data = le16_to_cpu(*(__le16 *) status);
+		ret = 0;
 		break;
 	default:
 		ret = -EIO;