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USB: ftdi_sio: fix latency-timeout endianess bug

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Also fixes DMA transfer to stack for latency buffer.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Johan Hovold 2009-12-24 12:42:08 +01:00 committed by Greg Kroah-Hartman
parent 4357369d02
commit 54f328d0c7
1 changed files with 10 additions and 4 deletions
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14
drivers/usb/serial/ftdi_sio.c
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@ -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;
}