linux-kernel - [PATCH] staging: comedi: remove this_board macro in the aio_aio12

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Date:	Tue, 22 May 2012 15:46:02 -0700
From:	H Hartley Sweeten <hartleys@...ionengravers.com>
To:	Linux Kernel <linux-kernel@...r.kernel.org>
CC:	<devel@...verdev.osuosl.org>, <abbotti@....co.uk>,
	<fmhess@...rs.sourceforge.net>, <gregkh@...uxfoundation.org>
Subject: [PATCH] staging: comedi: remove this_board macro in the aio_aio12_8 driver

The 'thisboard' macro depends on having a local variable with
a magic name. The CodingStyle document suggests not doing this
to avoid confusion. Remove the macro and use the comedi_board()
inline helper to get the dev->board_ptr information.

Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc: Ian Abbott <abbotti@....co.uk>
Cc: Mori Hess <fmhess@...rs.sourceforge.net>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---

diff --git a/drivers/staging/comedi/drivers/aio_aio12_8.c b/drivers/staging/comedi/drivers/aio_aio12_8.c
index 64d82bc..d215ae1 100644
--- a/drivers/staging/comedi/drivers/aio_aio12_8.c
+++ b/drivers/staging/comedi/drivers/aio_aio12_8.c
@@ -80,8 +80,6 @@ static const struct aio12_8_boardtype board_types[] = {
 	 .name = "aio_aio12_8"},
 };
 
-#define	thisboard	((const struct aio12_8_boardtype  *) dev->board_ptr)
-
 struct aio12_8_private {
 	unsigned int ao_readback[4];
 };
@@ -167,6 +165,7 @@ static const struct comedi_lrange range_aio_aio12_8 = {
 static int aio_aio12_8_attach(struct comedi_device *dev,
 			      struct comedi_devconfig *it)
 {
+	const struct aio12_8_boardtype *board = comedi_board(dev);
 	int iobase;
 	struct comedi_subdevice *s;
 
@@ -176,7 +175,7 @@ static int aio_aio12_8_attach(struct comedi_device *dev,
 		return -EIO;
 	}
 
-	dev->board_name = thisboard->name;
+	dev->board_name = board->name;
 
 	dev->iobase = iobase;
 
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