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Commit d5ccfce0 authored by Johan Hovold's avatar Johan Hovold
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USB: serial: f81534: clean up port bulk-out setup 



Setup each port to use the first bulk-out endpoint in calc_num_ports so
that core allocates the corresponding port resources for us.

Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
parent 5e07240a

drivers/usb/serial/f81534.c

+11 −51
Original line number Diff line number Diff line
@@ -687,6 +687,17 @@ static int f81534_calc_num_ports(struct usb_serial *serial, 
		num_port = 4;		/* Nothing found, oldest version IC */

	}



	/*

	 * Setup bulk-out endpoint multiplexing. All ports share the same

	 * bulk-out endpoint.

	 */

	BUILD_BUG_ON(ARRAY_SIZE(epds->bulk_out) < F81534_NUM_PORT);



	for (i = 1; i < num_port; ++i)

		epds->bulk_out[i] = epds->bulk_out[0];



	epds->num_bulk_out = num_port;



	return num_port;

}
@@ -1078,53 +1089,6 @@ static void f81534_write_usb_callback(struct urb *urb) 
	}

}



static int f81534_setup_ports(struct usb_serial *serial)

{

	struct usb_serial_port *port;

	u8 port0_out_address;

	int buffer_size;

	size_t i;



	/*

	 * In our system architecture, we had 2 or 4 serial ports,

	 * but only get 1 set of bulk in/out endpoints.

	 *

	 * The usb-serial subsystem will generate port 0 data,

	 * but port 1/2/3 will not. It's will generate write URB and buffer

	 * by following code and use the port0 read URB for read operation.

	 */

	for (i = 1; i < serial->num_ports; ++i) {

		port0_out_address = serial->port[0]->bulk_out_endpointAddress;

		buffer_size = serial->port[0]->bulk_out_size;

		port = serial->port[i];



		if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL))

			return -ENOMEM;



		port->bulk_out_size = buffer_size;

		port->bulk_out_endpointAddress = port0_out_address;



		port->write_urbs[0] = usb_alloc_urb(0, GFP_KERNEL);

		if (!port->write_urbs[0])

			return -ENOMEM;



		port->bulk_out_buffers[0] = kzalloc(buffer_size, GFP_KERNEL);

		if (!port->bulk_out_buffers[0])

			return -ENOMEM;



		usb_fill_bulk_urb(port->write_urbs[0], serial->dev,

				usb_sndbulkpipe(serial->dev,

					port0_out_address),

				port->bulk_out_buffers[0], buffer_size,

				serial->type->write_bulk_callback, port);



		port->write_urb = port->write_urbs[0];

		port->bulk_out_buffer = port->bulk_out_buffers[0];

	}



	return 0;

}



static int f81534_attach(struct usb_serial *serial)

{

	struct f81534_serial_private *serial_priv;
@@ -1141,10 +1105,6 @@ static int f81534_attach(struct usb_serial *serial) 


	mutex_init(&serial_priv->urb_mutex);



	status = f81534_setup_ports(serial);

	if (status)

		return status;



	/* Check had custom setting */

	status = f81534_find_config_idx(serial, &serial_priv->setting_idx);

	if (status) {