linux-kernel - Re: [PATCH v3] x86: keep chip_data in create_irq_nr and destroy

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Message-ID: <20100206200506.GA8256@jenkins.home.ifup.org>
Date:	Sat, 6 Feb 2010 12:05:06 -0800
From:	Brandon Philips <bphilips@...e.de>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] x86: keep chip_data in create_irq_nr and destroy_irq

On 23:16 Fri 05 Feb 2010, Yinghai Lu wrote:
> On 02/05/2010 10:42 PM, Brandon Philips wrote:
> @@ -3308,17 +3305,12 @@ void destroy_irq(unsigned int irq)
>  {
>  	unsigned long flags;
>  	struct irq_cfg *cfg;
> -	struct irq_desc *desc;
>  
> -	/* store it, in case dynamic_irq_cleanup clear it */
> -	desc = irq_to_desc(irq);
> -	cfg = desc->chip_data;
> -	dynamic_irq_cleanup(irq);
> -	/* connect back irq_cfg */
> -	desc->chip_data = cfg;
> +	dynamic_irq_cleanup_keep_chip_data(irq);
>  
>  	free_irte(irq);
>  	spin_lock_irqsave(&vector_lock, flags);
> +	cfg = irq_to_desc(irq)->chip_data;
>  	__clear_irq_vector(irq, cfg);

Or even two lines better!

 void destroy_irq(unsigned int irq)
 {
        unsigned long flags;
-       struct irq_cfg *cfg;
-       struct irq_desc *desc;
 
-       /* store it, in case dynamic_irq_cleanup clear it */
-       desc = irq_to_desc(irq);
-       cfg = desc->chip_data;
-       dynamic_irq_cleanup(irq);
-       /* connect back irq_cfg */
-       desc->chip_data = cfg;
+       dynamic_irq_cleanup_keep_chip_data(irq);
 
        free_irte(irq);
        spin_lock_irqsave(&vector_lock, flags);
-       __clear_irq_vector(irq, cfg);
+       __clear_irq_vector(irq, get_irq_chip_data(irq));
        spin_unlock_irqrestore(&vector_lock, flags);
 }
 

Sigh... I guess I will send the patch again :D

Cheers, 

	Brandon
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