USB: serial: add probe callback to generic driver

Add a probe callback to the generic driver and print the
only-for-testing message there.

This is a first step in getting rid of the CONFIG_USB_SERIAL_GENERIC
ifdef from usb-serial core.

Signed-off-by: Johan Hovold <johan@kernel.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index 49ce2be90fa0..8c7600472019 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -37,6 +37,17 @@ MODULE_PARM_DESC(product, "User specified USB idProduct");
 
 static struct usb_device_id generic_device_ids[2]; /* Initially all zeroes. */
 
+static int usb_serial_generic_probe(struct usb_serial *serial,
+                                        const struct usb_device_id *id)
+{
+        struct device *dev = &serial->interface->dev;
+
+        dev_info(dev, "The \"generic\" usb-serial driver is only for testing and one-off prototypes.\n");
+        dev_info(dev, "Tell linux-usb@vger.kernel.org to add your device to a proper driver.\n");
+
+        return 0;
+}
+
 struct usb_serial_driver usb_serial_generic_device = {
         .driver = {
                 .owner =        THIS_MODULE,
@@ -44,6 +55,7 @@ struct usb_serial_driver usb_serial_generic_device = {
         },
         .id_table =             generic_device_ids,
         .num_ports =            1,
+        .probe =                usb_serial_generic_probe,
         .throttle =             usb_serial_generic_throttle,
         .unthrottle =           usb_serial_generic_unthrottle,
         .resume =               usb_serial_generic_resume,