linux-kernel - Re: [PATCH v2] mfd: cros

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Date:   Mon, 19 Jun 2017 15:51:15 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Jeffy Chen <jeffy.chen@...k-chips.com>
Cc:     linux-kernel@...r.kernel.org, briannorris@...omium.org,
        dtor@...omium.org, dianders@...omium.org
Subject: Re: [PATCH v2] mfd: cros_ec: Free IRQ on exit

On Mon, 12 Jun 2017, Jeffy Chen wrote:

> Currently we request the irq when probing, but never free it. So after
> unbind ec driver, this irq will be left requested, which would break
> the next bind:
> [ 2683.338437] genirq: Flags mismatch irq 64. 00002008 (chromeos-ec) vs. 00002008 (chromeos-ec)
> [ 2683.338591] cros-ec-spi spi5.0: request irq 64: error -16
> [ 2683.338610] cros-ec-spi spi5.0: cannot register EC
> [ 2683.338656] cros-ec-spi: probe of spi5.0 failed with error -16
> 
> Signed-off-by: Jeffy Chen <jeffy.chen@...k-chips.com>
> 
> ---
> 
> Changes in v2:
> Improve the commit message.
> 
>  drivers/mfd/cros_ec.c | 3 +++
>  1 file changed, 3 insertions(+)

Applied, thanks.

> diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
> index e31ac60..dc6ce90 100644
> --- a/drivers/mfd/cros_ec.c
> +++ b/drivers/mfd/cros_ec.c
> @@ -183,6 +183,9 @@ int cros_ec_remove(struct cros_ec_device *ec_dev)
>  
>  	cros_ec_acpi_remove_gpe_handler();
>  
> +	if (ec_dev->irq)
> +		free_irq(ec_dev->irq, ec_dev);
> +
>  	return 0;
>  }
>  EXPORT_SYMBOL(cros_ec_remove);

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