Latency timeout was read but never stored on port probe. When ASYNC_LOW_LATENCY was cleared the device timeout would get set to 0 rather than the default 16ms. Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx> --- drivers/usb/serial/ftdi_sio.c | 9 +++++---- 1 files changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index 9c60d6d..dd130f7 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -1150,7 +1150,6 @@ static int read_latency_timer(struct usb_serial_port *port) unsigned short latency = 0; int rv = 0; - dbg("%s", __func__); rv = usb_control_msg(udev, @@ -1163,8 +1162,9 @@ static int read_latency_timer(struct usb_serial_port *port) if (rv < 0) { dev_err(&port->dev, "Unable to read latency timer: %i\n", rv); return -EIO; - } - return latency; + } else + priv->latency = latency; + return rv; } static int get_serial_info(struct usb_serial_port *port, @@ -1551,7 +1551,8 @@ static int ftdi_sio_port_probe(struct usb_serial_port *port) ftdi_determine_type(port); ftdi_set_max_packet_size(port); - read_latency_timer(port); + if (read_latency_timer(port) < 0) + priv->latency = 16; create_sysfs_attrs(port); return 0; } -- 1.6.5.3 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html