提交 8c4f99cd 编写于 作者: J Johan Hovold 提交者: Greg Kroah-Hartman

USB: ftdi_sio: fix initialisation of latency timeout

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: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
上级 b4fc2aee
......@@ -1184,7 +1184,6 @@ 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,
......@@ -1197,8 +1196,9 @@ 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,
......@@ -1584,7 +1584,8 @@ 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;
}
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册