linux-kernel - Re: [PATCHv4 05/11] omap3isp: Use *_dec_not_zero instead of *_add

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Date:	Sun, 31 Jul 2011 17:00:43 +0200
From:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:	Sven Eckelmann <sven@...fation.org>
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org
Subject: Re: [PATCHv4 05/11] omap3isp: Use *_dec_not_zero instead of *_add_unless

Hi Sven,

Thanks for the patch.

On Wednesday 27 July 2011 11:47:44 Sven Eckelmann wrote:
> atomic_dec_not_zero is defined for each architecture through
> <linux/atomic.h> to provide the functionality of
> atomic_add_unless(x, -1, 0).
> 
> Signed-off-by: Sven Eckelmann <sven@...fation.org>
> Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>

Acked-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

I'll queue this to my tree for v3.2. Please let me know if you would rather 
push the patch through another tree.

> Cc: linux-media@...r.kernel.org
> ---
>  drivers/media/video/omap3isp/ispstat.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/media/video/omap3isp/ispstat.c
> b/drivers/media/video/omap3isp/ispstat.c index b44cb68..81b1ec9 100644
> --- a/drivers/media/video/omap3isp/ispstat.c
> +++ b/drivers/media/video/omap3isp/ispstat.c
> @@ -652,7 +652,7 @@ static int isp_stat_buf_process(struct ispstat *stat,
> int buf_state) {
>  	int ret = STAT_NO_BUF;
> 
> -	if (!atomic_add_unless(&stat->buf_err, -1, 0) &&
> +	if (!atomic_dec_not_zero(&stat->buf_err) &&
>  	    buf_state == STAT_BUF_DONE && stat->state == ISPSTAT_ENABLED) {
>  		ret = isp_stat_buf_queue(stat);
>  		isp_stat_buf_next(stat);

-- 
Regards,

Laurent Pinchart
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