staging: comedi: ni_daq_700: fix dio subdevice regression

commit 6681e63399926651cc29bcb9d92229b6f1cf1daa upstream.

Here is a small patch to fix a problem caused by a previous patch that
removed the  callback function.  The callback remove patch:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=1de02225358988e8fd48d1dc3fd12336bbae258a

I finally booted my dev machine on the latest kernel (running Debian
here so it's still on 3.2 normally) to test the ni_daq_700 driver with
my test program and noticed this bug.

Shift the DIO_R read result to bits 8..15 Digital direction
configuration: channels 0-7 output, 8-15 input (8225 device emu as port
A output, port B input, port C N/A).

Signed-off-by: Fred Brooks <nsaspook@nsaspook.com>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/ni_daq_700.c b/drivers/staging/comedi/drivers/ni_daq_700.c
index 83016b411851f0ea02eb90721cbf3ae4754b7f54..bcf6a656c0a44df8b068f7d2b7db506a32f6d67d 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_daq_700.c
+++ b/drivers/staging/comedi/drivers/ni_daq_700.c
@@ -71,7 +71,7 @@ static int subdev_700_insn(struct comedi_device *dev,
        }
 
        data[1] = s->state & 0xff;
-       data[1] |= inb(dev->iobase + DIO_R);
+       data[1] |= inb(dev->iobase + DIO_R) << 8;
 
        return insn->n;
 }