linux-kernel - [ 029/101] staging: comedi: ni_daq_700: fix dio subdevice regression

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Message-Id: <20121029213243.450700715@linuxfoundation.org>
Date:	Mon, 29 Oct 2012 14:34:42 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	alan@...rguk.ukuu.org.uk, Fred Brooks <nsaspook@...spook.com>,
	Ian Abbott <abbotti@....co.uk>,
	H Hartley Sweeten <hsweeten@...ionengravers.com>
Subject: [ 029/101] staging: comedi: ni_daq_700: fix dio subdevice regression

3.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Fred Brooks <nsaspook@...spook.com>

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@...spook.com>
Signed-off-by: Ian Abbott <abbotti@....co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/staging/comedi/drivers/ni_daq_700.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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
 	}

 	data[1] = s->state & 0xff;
-	data[1] |= inb(dev->iobase + DIO_R);
+	data[1] |= inb(dev->iobase + DIO_R) << 8;

 	return insn->n;
 }

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