linux-kernel - Re: [PATCH v3 2/9] Staging: rts5208: rtsx_transport.c: Align to open parenthesis

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Date:	Tue, 09 Feb 2016 18:58:11 -0800
From:	Joe Perches <joe@...ches.com>
To:	Shaun Ren <shaun.ren@...ux.com>, gregkh@...uxfoundation.org,
	rjui@...adcom.com
Cc:	sbranden@...adcom.com, jonmason@...adcom.com,
	mahfouz.saif.elyazal@...il.com, devel@...verdev.osuosl.org,
	linux-arm-kernel@...ts.infradead.org,
	bcm-kernel-feedback-list@...adcom.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/9] Staging: rts5208: rtsx_transport.c: Align to
 open parenthesis

On Tue, 2016-02-09 at 18:45 -0800, Shaun Ren wrote:
> This patch fixes the alignment issue reported by checkpatch.pl:
> 
> CHECK: Alignment should match open parenthesis
> 
> Signed-off-by: Shaun Ren <shaun.ren@...ux.com>
> ---
>  drivers/staging/rts5208/rtsx_transport.c | 61 ++++++++++++++++++--------------
>  1 file changed, 35 insertions(+), 26 deletions(-)
> 
> diff --git a/drivers/staging/rts5208/rtsx_transport.c b/drivers/staging/rts5208/rtsx_transport.c
> index 5de8913..17bea8a 100644
> --- a/drivers/staging/rts5208/rtsx_transport.c
> +++ b/drivers/staging/rts5208/rtsx_transport.c
> @@ -42,8 +42,11 @@
>   */
>  
>  unsigned int rtsx_stor_access_xfer_buf(unsigned char *buffer,
> -	unsigned int buflen, struct scsi_cmnd *srb, unsigned int *index,
> -	unsigned int *offset, enum xfer_buf_dir dir)
> +				       unsigned int buflen,
> +				       struct scsi_cmnd *srb,
> +				       unsigned int *index,
> +				       unsigned int *offset,
> +				     enum xfer_buf_dir dir)

Doesn't this look odd to you?

>  {
>  	unsigned int cnt;
>  
> @@ -54,10 +57,10 @@ unsigned int rtsx_stor_access_xfer_buf(unsigned char *buffer,
>  		cnt = min(buflen, scsi_bufflen(srb) - *offset);
>  		if (dir == TO_XFER_BUF)
>  			memcpy((unsigned char *) scsi_sglist(srb) + *offset,
> -					buffer, cnt);
> +			       buffer, cnt);
>  		else
>  			memcpy(buffer, (unsigned char *) scsi_sglist(srb) +
> -					*offset, cnt);
> +			       *offset, cnt);

If you really want to make this look nicer and more
intelligible, it's probably be better to use a more
symmetric form like:

		if (dir == TO_XFER_BUF)
			memcpy((unsigned char *)scsi_sglist(srb) + *offset,
			       buffer,
			       cnt);
		else
			memcpy(buffer,
			       (unsigned char *)scsi_sglist(srb) + *offset,
			       cnt);
or maybe

		void *to;
		void *from;

		[...]

		if (dir == TO_XFER_BUF) {
			to = (unsigned char *)scsi_sglist(srb) + *offset;
			from = buffer;
		} else {
			to = buffer;
			from = (unsigned char *)scsi_sglist(srb) +
*offset;
		}
		memcpy(to, from, cnt);

or maybe

		void *to;
		void *from;

		[...]

		to = (unsigned char *)scsi_sglist(srb) + *offset;
		from = buffer;
		if (dir != TO_XFER_BUF)
			swap(to, from);

		memcpy(to, from, cnt);