USB: ftdi_sio: clean up ftdi_set_max_packet_size() (47e57595) · Commits · e / devices / android_kernel_teracube_2e

drivers/usb/serial/ftdi_sio.c

+13 −11

Original line number	Diff line number	Diff line
		@@ -1556,16 +1556,16 @@ static void ftdi_determine_type(struct usb_serial_port *port)
		}


		/* Determine the maximum packet size for the device. This depends on the chip
		/*
		* Determine the maximum packet size for the device. This depends on the chip
		* type and the USB host capabilities. The value should be obtained from the
		* device descriptor as the chip will use the appropriate values for the host.*/
		* device descriptor as the chip will use the appropriate values for the host.
		*/
		static void ftdi_set_max_packet_size(struct usb_serial_port *port)
		{
		struct ftdi_private *priv = usb_get_serial_port_data(port);
		struct usb_serial *serial = port->serial;
		struct usb_interface *interface = serial->interface;
		struct usb_interface *interface = port->serial->interface;
		struct usb_endpoint_descriptor *ep_desc;

		unsigned num_endpoints;
		unsigned i;

		@@ -1573,20 +1573,22 @@ static void ftdi_set_max_packet_size(struct usb_serial_port *port)
		if (!num_endpoints)
		return;

		/* NOTE: some customers have programmed FT232R/FT245R devices
		/*
		* NOTE: Some customers have programmed FT232R/FT245R devices
		* with an endpoint size of 0 - not good. In this case, we
		* want to override the endpoint descriptor setting and use a
		* value of 64 for wMaxPacketSize */
		* value of 64 for wMaxPacketSize.
		*/
		for (i = 0; i < num_endpoints; i++) {
		ep_desc = &interface->cur_altsetting->endpoint[i].desc;
		if (ep_desc->wMaxPacketSize == 0) {
		if (!ep_desc->wMaxPacketSize) {
		ep_desc->wMaxPacketSize = cpu_to_le16(0x40);
		dev_warn(&port->dev, "Overriding wMaxPacketSize on endpoint %d\n",
		usb_endpoint_num(ep_desc));
		}
		}

		/* set max packet size based on descriptor */
		/* Set max packet size based on last descriptor. */
		priv->max_packet_size = usb_endpoint_maxp(ep_desc);
		}