linux-kernel - Re: [PATCH 6/6 RESEND] mfd: arizona: Only free the CTRLIF

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Date:	Mon, 28 Jul 2014 08:03:13 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
Cc:	sameo@...ux.intel.com, broonie@...nel.org, lgirdwood@...il.com,
	patches@...nsource.wolfsonmicro.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/6 RESEND] mfd: arizona: Only free the CTRLIF_ERR IRQ if
 we requested it

On Tue, 15 Jul 2014, Charles Keepax wrote:

> We only request the control interface error IRQ if we set ctrlif_error,
> as such we should only free it in that situation. Otherwise we will
> attempt to free an IRQ we never requested and get a warning from the IRQ
> core.
> 
> This patch moves the ctrlif_error variable into the arizona structure
> and checks it in all cases we free the control interface error IRQ.
> 
> Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
> ---
>  drivers/mfd/arizona-irq.c        |   19 ++++++++++++-------
>  include/linux/mfd/arizona/core.h |    2 ++
>  2 files changed, 14 insertions(+), 7 deletions(-)

Applied, thanks.

> diff --git a/drivers/mfd/arizona-irq.c b/drivers/mfd/arizona-irq.c
> index e780bc4..d420dbc 100644
> --- a/drivers/mfd/arizona-irq.c
> +++ b/drivers/mfd/arizona-irq.c
> @@ -188,16 +188,17 @@ int arizona_irq_init(struct arizona *arizona)
>  	int flags = IRQF_ONESHOT;
>  	int ret, i;
>  	const struct regmap_irq_chip *aod, *irq;
> -	bool ctrlif_error = true;
>  	struct irq_data *irq_data;
>  
> +	arizona->ctrlif_error = true;
> +
>  	switch (arizona->type) {
>  #ifdef CONFIG_MFD_WM5102
>  	case WM5102:
>  		aod = &wm5102_aod;
>  		irq = &wm5102_irq;
>  
> -		ctrlif_error = false;
> +		arizona->ctrlif_error = false;
>  		break;
>  #endif
>  #ifdef CONFIG_MFD_WM5110
> @@ -213,7 +214,7 @@ int arizona_irq_init(struct arizona *arizona)
>  			break;
>  		}
>  
> -		ctrlif_error = false;
> +		arizona->ctrlif_error = false;
>  		break;
>  #endif
>  #ifdef CONFIG_MFD_WM8997
> @@ -221,7 +222,7 @@ int arizona_irq_init(struct arizona *arizona)
>  		aod = &wm8997_aod;
>  		irq = &wm8997_irq;
>  
> -		ctrlif_error = false;
> +		arizona->ctrlif_error = false;
>  		break;
>  #endif
>  	default:
> @@ -308,7 +309,7 @@ int arizona_irq_init(struct arizona *arizona)
>  	}
>  
>  	/* Handle control interface errors in the core */
> -	if (ctrlif_error) {
> +	if (arizona->ctrlif_error) {
>  		i = arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR);
>  		ret = request_threaded_irq(i, NULL, arizona_ctrlif_err,
>  					   IRQF_ONESHOT,
> @@ -353,7 +354,9 @@ int arizona_irq_init(struct arizona *arizona)
>  	return 0;
>  
>  err_main_irq:
> -	free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), arizona);
> +	if (arizona->ctrlif_error)
> +		free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR),
> +			 arizona);
>  err_ctrlif:
>  	free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
>  err_boot_done:
> @@ -369,7 +372,9 @@ err:
>  
>  int arizona_irq_exit(struct arizona *arizona)
>  {
> -	free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), arizona);
> +	if (arizona->ctrlif_error)
> +		free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR),
> +			 arizona);
>  	free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
>  	regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
>  			    arizona->irq_chip);
> diff --git a/include/linux/mfd/arizona/core.h b/include/linux/mfd/arizona/core.h
> index 8bc7601..fdd8b7b 100644
> --- a/include/linux/mfd/arizona/core.h
> +++ b/include/linux/mfd/arizona/core.h
> @@ -132,6 +132,8 @@ struct arizona {
>  	struct mutex clk_lock;
>  	int clk32k_ref;
>  
> +	bool ctrlif_error;
> +
>  	struct snd_soc_dapm_context *dapm;
>  };
>  

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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