diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/ftdi_sio.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index 6cfa55a2f804..6451bf47b05b 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -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 - * 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.*/ +/* + * 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. + */ 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 - * with an endpoint size of 0 - not good. In this case, we + /* + * 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); } |