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Commit 54f328d0 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
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USB: ftdi_sio: fix latency-timeout endianess bug 



Also fixes DMA transfer to stack for latency buffer.

Signed-off-by: default avatarJohan Hovold <jhovold@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 4357369d

drivers/usb/serial/ftdi_sio.c

+10 −4
Original line number Diff line number Diff line
@@ -1181,22 +1181,28 @@ static int read_latency_timer(struct usb_serial_port *port) 
{

	struct ftdi_private *priv = usb_get_serial_port_data(port);

	struct usb_device *udev = port->serial->dev;

	unsigned short latency = 0;

	unsigned char *buf;

	int rv = 0;



	dbg("%s", __func__);



	buf = kmalloc(1, GFP_KERNEL);

	if (!buf)

		return -ENOMEM;



	rv = usb_control_msg(udev,

			     usb_rcvctrlpipe(udev, 0),

			     FTDI_SIO_GET_LATENCY_TIMER_REQUEST,

			     FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,

			     0, priv->interface,

			     (char *) &latency, 1, WDR_TIMEOUT);



			     buf, 1, WDR_TIMEOUT);

	if (rv < 0)

		dev_err(&port->dev, "Unable to read latency timer: %i\n", rv);

	else

		priv->latency = latency;

		priv->latency = buf[0];



	kfree(buf);



	return rv;

}