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

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Message-ID: <4B6D173C.4070200@kernel.org>
Date:	Fri, 05 Feb 2010 23:16:12 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Brandon Philips <bphilips@...e.de>
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 02/05/2010 10:42 PM, Brandon Philips wrote:
> Version 3: Forgot to refresh patch so destroy_irq() had uninitialized
> cfg as param to __clear_irq_vector(). Fixed now.
  
> @@ -3255,19 +3252,15 @@ int create_irq(void)
>  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, desc->chip_data);
>  	spin_unlock_irqrestore(&vector_lock, flags);
>  }

==>
@@ -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);
 	spin_unlock_irqrestore(&vector_lock, flags);
 }


Yinghai
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