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[PATCH] USB: pl2303 driver, makes pl2303HX chip work correctly

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This trivial patch makes pl2303 driver work correctly with pl2303HX chip.
Apparently some bug in HX version of pl2303 makes the chip loose some
transmitted bytes or stop working at all after reception of
USB_REQ_CLEAR_FEATURE mesage. Logs generated by UsbSnoop application reveal
that windows driver does not send this type of messages to the converter.

From: "Dariusz M." <D.Marcinkiewicz@elka.pw.edu.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Dariusz M 2005-07-28 18:06:13 +02:00 committed by Greg Kroah-Hartman
parent ef08402860
commit 1694899fd1
1 changed files with 4 additions and 2 deletions
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6
drivers/usb/serial/pl2303.c
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@ -538,8 +538,10 @@ static int pl2303_open (struct usb_serial_port *port, struct file *filp)
dbg("%s - port %d", __FUNCTION__, port->number);
usb_clear_halt(serial->dev, port->write_urb->pipe);
usb_clear_halt(serial->dev, port->read_urb->pipe);
if (priv->type != HX) {
usb_clear_halt(serial->dev, port->write_urb->pipe);
usb_clear_halt(serial->dev, port->read_urb->pipe);
}
buf = kmalloc(10, GFP_KERNEL);
if (buf==NULL)