USB: ftdi_sio: fix latency-timeout endianess bug
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>hifive-unleashed-5.1
parent
4357369d02
commit
54f328d0c7
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@ -1181,22 +1181,28 @@ static int read_latency_timer(struct usb_serial_port *port)
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{
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{
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struct ftdi_private *priv = usb_get_serial_port_data(port);
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struct ftdi_private *priv = usb_get_serial_port_data(port);
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struct usb_device *udev = port->serial->dev;
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struct usb_device *udev = port->serial->dev;
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unsigned short latency = 0;
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unsigned char *buf;
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int rv = 0;
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int rv = 0;
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dbg("%s", __func__);
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dbg("%s", __func__);
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buf = kmalloc(1, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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rv = usb_control_msg(udev,
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rv = usb_control_msg(udev,
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usb_rcvctrlpipe(udev, 0),
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usb_rcvctrlpipe(udev, 0),
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FTDI_SIO_GET_LATENCY_TIMER_REQUEST,
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FTDI_SIO_GET_LATENCY_TIMER_REQUEST,
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FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,
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FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,
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0, priv->interface,
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0, priv->interface,
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(char *) &latency, 1, WDR_TIMEOUT);
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buf, 1, WDR_TIMEOUT);
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if (rv < 0)
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if (rv < 0)
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dev_err(&port->dev, "Unable to read latency timer: %i\n", rv);
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dev_err(&port->dev, "Unable to read latency timer: %i\n", rv);
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else
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else
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priv->latency = latency;
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priv->latency = buf[0];
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kfree(buf);
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return rv;
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return rv;
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}
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}
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