linux-kernel - Re: [PATCH 2/3] V4L: zc0301, remove bad usage of ERESTARTSYS

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Date:	Wed, 10 Oct 2007 02:18:50 +0200
From:	Luca Risolia <luca.risolia@...dio.unibo.it>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	linux-usb-devel@...ts.sourceforge.net, mchehab@...radead.org,
	video4linux-list@...hat.com
Subject: Re: [PATCH 2/3] V4L: zc0301, remove bad usage of ERESTARTSYS

acked-by: Luca Risolia <luca.risolia@...dio.unibo.it>


On Monday 08 October 2007 14:40:53 Jiri Slaby wrote:
> zc0301, remove bad usage of ERESTARTSYS
>
> down_read_trylock can't be interrupted and so ERESTARTSYS would reach
> userspace, which is not permitted. Change it to EAGAIN
>
> Signed-off-by: Jiri Slaby <jirislaby@...il.com>
>
> ---
> commit 235cf594bc65128250632a642f3e9d7e4df4975e
> tree 0557746416827daeb4d829610fec2f0c9111a675
> parent db38c559d37219c32b179ae005ca7e489336ec94
> author Jiri Slaby <jirislaby@...il.com> Mon, 08 Oct 2007 14:15:47 +0200
> committer Jiri Slaby <jirislaby@...il.com> Mon, 08 Oct 2007 14:15:47 +0200
>
>  drivers/media/video/zc0301/zc0301_core.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/media/video/zc0301/zc0301_core.c
> b/drivers/media/video/zc0301/zc0301_core.c index 35138c5..08a93c3 100644
> --- a/drivers/media/video/zc0301/zc0301_core.c
> +++ b/drivers/media/video/zc0301/zc0301_core.c
> @@ -655,7 +655,7 @@ static int zc0301_open(struct inode* inode, struct
> file* filp) int err = 0;
>
>  	if (!down_read_trylock(&zc0301_dev_lock))
> -		return -ERESTARTSYS;
> +		return -EAGAIN;
>
>  	cam = video_get_drvdata(video_devdata(filp));


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