linux-kernel - Re: [PATCH] unlock 12c

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Message-ID: <je3aw217on.fsf@sykes.suse.de>
Date:	Tue, 23 Oct 2007 11:50:16 +0200
From:	Andreas Schwab <schwab@...e.de>
To:	Roel Kluin <12o3l@...cali.nl>
Cc:	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] unlock 12c_mutex before return

Roel Kluin <12o3l@...cali.nl> writes:

>     unlock 12c_mutex before return -EINVAL
>     
>     Signed-off-by: Roel Kluin <12o3l@...cali.nl>
> ---
> diff --git a/drivers/media/dvb/dvb-usb/au6610.c b/drivers/media/dvb/dvb-usb/au6610.c
> index 18e0b16..31f47c7 100644
> --- a/drivers/media/dvb/dvb-usb/au6610.c
> +++ b/drivers/media/dvb/dvb-usb/au6610.c
> @@ -82,8 +82,10 @@ static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
>  	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
>  		return -EAGAIN;
>  
> -	if (num > 2)
> +	if (num > 2) {
> +                mutex_unlock(&d->i2c_mutex);
>  		return -EINVAL;

How about moving the check before the lock?

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@...e.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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