linux-kernel - Re: [PATCH 1/4] mfd: twl6030-irq: migrate to IRQ threaded handler

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Date:	Wed, 24 Jul 2013 12:54:13 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Grygorii Strashko <grygorii.strashko@...com>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>,
	Kevin Hilman <khilman@...aro.org>,
	Graeme Gregory <gg@...mlogic.co.uk>,
	linux-omap@...r.kernel.org, Ruslan Bilovol <ruslan.bilovol@...com>,
	linux-kernel@...r.kernel.org,
	Naga Venkata Srikanth V <vnv.srikanth@...sung.com>,
	Oleg_Kosheliev <oleg.kosheliev@...com>
Subject: Re: [PATCH 1/4] mfd: twl6030-irq: migrate to IRQ threaded handler

On Tue, 23 Jul 2013, Grygorii Strashko wrote:

> From: Naga Venkata Srikanth V <vnv.srikanth@...sung.com>
> 
> 1) Removed request_irq() and replaced it with request_threaded_irq().
> 
> 2) Removed generic_handle_irq() and replaced it with
> handle_nested_irq().
>   Handling of these interrupts is nested, as we are handling an
> interrupt (for e.g rtc, mmc1) when we are still servicing TWL irq.
> 
> 3) Removed I2C read-retry logic for the case when twl_i2c_read() is
> failed inside IRQ handler - there is no sense to do that, so just report
> an error and return.
> 
> Signed-off-by: Naga Venkata Srikanth V <vnv.srikanth@...sung.com>
> Signed-off-by: Oleg_Kosheliev <oleg.kosheliev@...com>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
> ---
>  drivers/mfd/twl6030-irq.c |  146 +++++++++++++++------------------------------
>  1 file changed, 49 insertions(+), 97 deletions(-)
> 
> diff --git a/drivers/mfd/twl6030-irq.c b/drivers/mfd/twl6030-irq.c

<snip>

> +	status = request_threaded_irq(irq_num, NULL, twl6030_irq_thread,
> +				      IRQF_ONESHOT, "TWL6030-PIH", NULL);

Oh, and please use managed resources for this: devm_*

>  	if (status < 0) {
>  		dev_err(dev, "could not claim irq %d: %d\n", irq_num, status);
>  		goto fail_irq;
>  	}
>  

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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