Messages in this thread Patch in this message | | | From | Johan Hovold <> | Subject | [PATCH 2/5] USB: ftdi_sio: fix latency-timeout endianess bug | Date | Thu, 24 Dec 2009 12:42:08 +0100 |
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Also fixes DMA transfer to stack for latency buffer.
Signed-off-by: Johan Hovold <jhovold@gmail.com> --- drivers/usb/serial/ftdi_sio.c | 14 ++++++++++---- 1 files changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index a952a3a..6d191fb 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -1162,22 +1162,28 @@ 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; } -- 1.6.6.rc4
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