Add device function for USB serial console

Add device funtion for usb serial console, so we can open /dev/console
when we use a usb serial device as console.

(Typecast removed as noted by Sergei Shtylyov)

Signed-off-by: Kevin Hao <kexin.hao@windriver.com>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c
index 5b95009d2fb..19e24045b13 100644
--- a/drivers/usb/serial/console.c
+++ b/drivers/usb/serial/console.c
@@ -241,12 +241,25 @@ static void usb_console_write(struct console *co,
         }
 }
 
+static struct tty_driver *usb_console_device(struct console *co, int *index)
+{
+        struct tty_driver **p = (struct tty_driver **)co->data;
+
+        if (!*p)
+                return NULL;
+
+        *index = co->index;
+        return *p;
+}
+
 static struct console usbcons = {
         .name =         "ttyUSB",
         .write =        usb_console_write,
+        .device =       usb_console_device,
         .setup =        usb_console_setup,
         .flags =        CON_PRINTBUFFER,
         .index =        -1,
+        .data =         &usb_serial_tty_driver,
 };
 
 void usb_serial_console_disconnect(struct usb_serial *serial)