linux-kernel - Re: [PATCH] MFD: ezx-pcap, fix lock imbalance

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Date:	Wed, 01 Jul 2009 04:04:31 -0300
From:	Daniel Ribeiro <drwyrm@...il.com>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	sameo@...ux.intel.com, laforge@...nezx.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] MFD: ezx-pcap, fix lock imbalance

Hi Jiri,

Em Qua, 2009-07-01 às 08:53 +0200, Jiri Slaby escreveu:
> There is an omitted unlock in pcap_adc_irq ISR on one fail path. Fix that.
> 
> Signed-off-by: Jiri Slaby <jirislaby@...il.com>

I would be happy to ack this, however, you are late. ;)

http://patchwork.kernel.org/patch/32002/

Samuel seems to be unreachable ATM, last email I have from him is from
June 16. :(

> ---
>  drivers/mfd/ezx-pcap.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c
> index 671a7ef..c1de4af 100644
> --- a/drivers/mfd/ezx-pcap.c
> +++ b/drivers/mfd/ezx-pcap.c
> @@ -238,8 +238,10 @@ static irqreturn_t pcap_adc_irq(int irq, void *_pcap)
>  	mutex_lock(&pcap->adc_mutex);
>  	req = pcap->adc_queue[pcap->adc_head];
>  
> -	if (WARN(!req, KERN_WARNING "adc irq without pending request\n"))
> +	if (WARN(!req, KERN_WARNING "adc irq without pending request\n")) {
> +		mutex_unlock(&pcap->adc_mutex);
>  		return IRQ_HANDLED;
> +	}
>  
>  	/* read requested channels results */
>  	ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp);

-- 
Daniel Ribeiro

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