USB: serial: generalise generic read implementation
Add process_read_urb to usb_serial_driver so that a driver can rely on
the generic read (and throttle) mechanism but still do device specific
processing of incoming data (such as adding tty_flags before pushing to
line discipline).
The default generic implementation handles sysrq for consoles but
otherwise simply pushes to tty.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index e16c0b2..176f125 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -408,7 +408,7 @@
}
EXPORT_SYMBOL_GPL(usb_serial_generic_submit_read_urb);
-static void usb_serial_generic_process_read_urb(struct urb *urb)
+void usb_serial_generic_process_read_urb(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
struct tty_struct *tty;
@@ -433,6 +433,7 @@
tty_flip_buffer_push(tty);
tty_kref_put(tty);
}
+EXPORT_SYMBOL_GPL(usb_serial_generic_process_read_urb);
void usb_serial_generic_read_bulk_callback(struct urb *urb)
{
@@ -451,7 +452,7 @@
usb_serial_debug_data(debug, &port->dev, __func__,
urb->actual_length, data);
- usb_serial_generic_process_read_urb(urb);
+ port->serial->type->process_read_urb(urb);
/* Throttle the device if requested by tty */
spin_lock_irqsave(&port->lock, flags);