linux-kernel - Re: [PATCH] gpu: ipu-v3: wait_for_completion

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Date:	Mon, 19 Jan 2015 09:09:11 +0100
From:	Philipp Zabel <p.zabel@...gutronix.de>
To:	Nicholas Mc Guire <der.herr@...r.at>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Lucas Stach <l.stach@...gutronix.de>,
	Emil Renner Berthing <kernel@...il.dk>,
	Antoine Schweitzer-Chaput <antoine@...weitzer-chaput.fr>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] gpu: ipu-v3: wait_for_completion_timeout does not
 return negativ status

Hi Nicholas,

thank you for the patch.

Am Freitag, den 16.01.2015, 11:48 +0100 schrieb Nicholas Mc Guire:
> Signed-off-by: Nicholas Mc Guire <der.herr@...r.at>
> ---
> 
> Patch is against 3.19.0-rc3 -next-20150109
> 
> This patch was compiletested with imx_v6_v7_defconfig + 
> CONFIG_RESET_CONTROLLER=y, CONFIG_IMX_IPUV3_CORE=m
> 
>  drivers/gpu/ipu-v3/ipu-dc.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/ipu-v3/ipu-dc.c b/drivers/gpu/ipu-v3/ipu-dc.c
> index 2326c75..0ffa659 100644
> --- a/drivers/gpu/ipu-v3/ipu-dc.c
> +++ b/drivers/gpu/ipu-v3/ipu-dc.c
> @@ -282,7 +282,7 @@ void ipu_dc_disable_channel(struct ipu_dc *dc)
>  	enable_irq(irq);
>  	ret = wait_for_completion_timeout(&priv->comp, msecs_to_jiffies(50));
>  	disable_irq(irq);
> -	if (ret <= 0) {
> +	if (ret == 0) {

In addition to this, I think ret should be changed to unsigned long.

regards
Philipp

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