linux-kernel - Re: [PATCH 2/2] Staging: comedi: ni

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Date:   Mon, 5 Sep 2016 14:32:37 +0100
From:   Ian Abbott <abbotti@....co.uk>
To:     Amit Ghadge <amitg.b14@...il.com>
Cc:     gregkh@...uxfoundation.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] Staging: comedi: ni_670x.c: Fix warnings and check.

On 03/09/16 21:11, Amit Ghadge wrote:
> Fixes checkpatch warning:
> WARNING: Block comments use * on subsequent lines
>
> Replace (1<<7) by BIT(7) in the file ni_670x.c to get rid
> of checkpatch.pl "CHECK" output "Prefer using the BIT macro".
> Replace Avoid CamelCase range_0_20mA to range_0_20ma.
>
> Signed-off-by: Amit Ghadge <amitg.b14@...il.com>
> ---
>  drivers/staging/comedi/drivers/ni_670x.c | 66 ++++++++++++++++----------------
>  1 file changed, 32 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/staging/comedi/drivers/ni_670x.c b/drivers/staging/comedi/drivers/ni_670x.c
> index 3e7271880..86d26aa 100644
> --- a/drivers/staging/comedi/drivers/ni_670x.c
> +++ b/drivers/staging/comedi/drivers/ni_670x.c
> @@ -1,40 +1,38 @@
>  /*
> -    comedi/drivers/ni_670x.c
> -    Hardware driver for NI 670x devices
> -
> -    COMEDI - Linux Control and Measurement Device Interface
> -    Copyright (C) 1997-2001 David A. Schleef <ds@...leef.org>
> -
> -    This program is free software; you can redistribute it and/or modify
> -    it under the terms of the GNU General Public License as published by
> -    the Free Software Foundation; either version 2 of the License, or
> -    (at your option) any later version.
> -
> -    This program is distributed in the hope that it will be useful,
> -    but WITHOUT ANY WARRANTY; without even the implied warranty of
> -    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> -    GNU General Public License for more details.
> -*/
> + * comedi/drivers/ni_670x.c
> + * Hardware driver for NI 670x devices
> +
> + * COMEDI - Linux Control and Measurement Device Interface
> + * Copyright (C) 1997-2001 David A. Schleef <ds@...leef.org>
> +
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> +
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
>  /*
> -Driver: ni_670x
> -Description: National Instruments 670x
> -Author: Bart Joris <bjoris@...alvas.be>
> -Updated: Wed, 11 Dec 2002 18:25:35 -0800
> -Devices: [National Instruments] PCI-6703 (ni_670x), PCI-6704
> -Status: unknown
> -
> -Commands are not supported.
> -*/
> -
> + * Driver: ni_670x
> + * Description: National Instruments 670x
> + * Author: Bart Joris <bjoris@...alvas.be>
> + * Updated: Wed, 11 Dec 2002 18:25:35 -0800
> + * Devices: [National Instruments] PCI-6703 (ni_670x), PCI-6704
> + * Status: unknown
> +
> + * Commands are not supported.
> + */
>  /*
> -	Bart Joris <bjoris@...alvas.be> Last updated on 20/08/2001
> -
> -	Manuals:
> + * Bart Joris <bjoris@...alvas.be> Last updated on 20/08/2001
>
> -	322110a.pdf	PCI/PXI-6704 User Manual
> -	322110b.pdf	PCI/PXI-6703/6704 User Manual
> + * Manuals:
>
> -*/
> + * 322110a.pdf	PCI/PXI-6704 User Manual
> + * 322110b.pdf	PCI/PXI-6703/6704 User Manual
> + */

In addition to the problems mentioned by Greg, the blank lines in those 
comment blocks also need a " *" to give an unbroken line of "*" down the 
left hand side of the comment block.

>  #include <linux/module.h>
>  #include <linux/interrupt.h>
> @@ -147,7 +145,7 @@ static int ni_670x_dio_insn_config(struct comedi_device *dev,
>
>  /* ripped from mite.h and mite_setup2() to avoid mite dependency */
>  #define MITE_IODWBSR	0xc0	 /* IO Device Window Base Size Register */
> -#define WENAB		(1 << 7) /* window enable */
> +#define WENAB		BIT(7) /* window enable */
>
>  static int ni_670x_mite_init(struct pci_dev *pcidev)
>  {
> @@ -222,7 +220,7 @@ static int ni_670x_auto_attach(struct comedi_device *dev,
>  		s->range_table_list = range_table_list;
>  		for (i = 0; i < 16; i++) {
>  			range_table_list[i] = &range_bipolar10;
> -			range_table_list[16 + i] = &range_0_20mA;
> +			range_table_list[16 + i] = &range_0_20ma;

You can't just rename variables shared by other modules like that. 
Besides, the "mA" suffix is perfectly fine here, because it is the 
correct S.I. suffix for "milliamps".  (Comedi doesn't bother adding a 
"V" suffix for voltage range variables, as in the "range_bipolar10" 
variable below, but it does add a suffix for the less common units such 
as milliamps.)

>  		}
>  	} else {
>  		s->range_table = &range_bipolar10;
>


-- 
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbotti@....co.uk> )=-
-=(                          Web: http://www.mev.co.uk/  )=-