linux-kernel - Re: [PATCH] ipoctal: request

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Date:	Thu, 03 Jul 2014 10:56:55 +0200
From:	Samuel Iglesias Gonsálvez 
	<siglesias@...lia.com>
To:	Federico Vaga <federico.vaga@...n.ch>
Cc:	Jens Taprogge <jens.taprogge@...rogge.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	industrypack-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ipoctal: request_irq after configuration

On Thu, 2014-07-03 at 10:53 +0200, Federico Vaga wrote:
> The request for an IRQ handler must be done after whole configuration. This
> was not the case for this driver which request the IRQ in the middle of
> the configuration. Sometimes, it happens that something is not completely
> configured, we recieve an interrupt thus we stumble into troubles in the
> IRQ handler.
> 
> Signed-off-by: Federico Vaga <federico.vaga@...n.ch>
> ---
>  drivers/ipack/devices/ipoctal.c |   15 ++++++++-------
>  1 file changed, 8 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
> index a7ec6f9..72fd761 100644
> --- a/drivers/ipack/devices/ipoctal.c
> +++ b/drivers/ipack/devices/ipoctal.c
> @@ -344,13 +344,6 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
>  			 &block_regs[i].w.imr);
>  	}
>  
> -	/*
> -	 * IP-OCTAL has different addresses to copy its IRQ vector.
> -	 * Depending of the carrier these addresses are accesible or not.
> -	 * More info in the datasheet.
> -	 */
> -	ipoctal->dev->bus->ops->request_irq(ipoctal->dev,
> -				       ipoctal_irq_handler, ipoctal);
>  	/* Dummy write */
>  	iowrite8(1, ipoctal->mem8_space + 1);
>  
> @@ -411,6 +404,14 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
>  		dev_set_drvdata(tty_dev, channel);
>  	}
>  
> +	/*
> +	 * IP-OCTAL has different addresses to copy its IRQ vector.
> +	 * Depending of the carrier these addresses are accesible or not.
> +	 * More info in the datasheet.
> +	 */
> +	ipoctal->dev->bus->ops->request_irq(ipoctal->dev,
> +				       ipoctal_irq_handler, ipoctal);
> +
>  	return 0;
>  }
>  

Acked-by: Samuel Iglesias Gonsalvez <siglesias@...lia.com>

Greg, Would you mind picking this patch through your driver-core tree?
Together with "ipoctal: protect only the real critical section" patch.

Thanks,

Sam

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