linux-kernel - Re: [PATCH] staging: comedi: drivers: pcl812.c: fixed a coding style issue

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Date:	Fri, 04 Apr 2014 08:28:07 -0700
From:	Joe Perches <joe@...ches.com>
To:	Kumar Amit Mehta <gmate.amit@...il.com>
Cc:	Dan Carpenter <dan.carpenter@...cle.com>, abbotti@....co.uk,
	hsweeten@...ionengravers.com, wharms@....de,
	gregkh@...uxfoundation.org, devel@...verdev.osuosl.org,
	kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: comedi: drivers: pcl812.c: fixed a coding
 style issue

On Fri, 2014-04-04 at 18:17 +0300, Kumar Amit Mehta wrote:
> What Walter mentioned also makes sense, So shouldn't it be something
> like this:

I'm not Dan, but:

> [amit@...alhost linux-next]$ git diff
> diff --git a/drivers/staging/comedi/drivers/pcl812.c
> b/drivers/staging/comedi/drivers/pcl812.c
> index 160eac8..552b696 100644
> --- a/drivers/staging/comedi/drivers/pcl812.c
> +++ b/drivers/staging/comedi/drivers/pcl812.c
> @@ -803,16 +803,14 @@ static int pcl812_ai_cmd(struct comedi_device
> *dev, struct comedi_subdevice *s)
>  
>         pcl812_ai_set_chan_range(dev, cmd->chanlist[0], 1);
>  
> +       devpriv->ai_dma = 0;
>         if (devpriv->dma) {     /*  check if we can use DMA transfer */
>                 devpriv->ai_dma = 1;
>                 for (i = 1; i < cmd->chanlist_len; i++)
>                         if (cmd->chanlist[0] != cmd->chanlist[i]) {
>                                 /*  we cann't use DMA :-( */
> -                               devpriv->ai_dma = 0;

No.

You enable unwanted DMA capability here.
There's a typo of can't too.

>                                 break;
>                         }
> -       } else
> -               devpriv->ai_dma = 0;

Otherwise, I suppose either style is OK.

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