linux-kernel - Re: [patch 07/26] pci: pcie-designware: Remove irq

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Date:	Sun, 23 Feb 2014 23:33:19 +0000 (GMT)
From:	Jingoo Han <jg1.han@...sung.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Mohit Kumar <mohit.kumar@...com>,
	pci <linux-pci@...r.kernel.org>, Jingoo Han <jg1.han@...sung.com>
Subject: Re: [patch 07/26] pci: pcie-designware: Remove irq_desc abuse

On Monday, February 24, 2014 6:40 AM, Thomas Gleixner wrote:
> 
> There is no reason to care about irq_desc in that context, escpecially
> as irq_data for that interrupt is retrieved as well.
> 
> Use the proper accessor for the msi descriptor
> 
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> Cc: Bjorn Helgaas <bhelgaas@...gle.com>
> Cc: Jingoo Han <jg1.han@...sung.com>
> Cc: Mohit Kumar <mohit.kumar@...com>
> Cc: pci <linux-pci@...r.kernel.org>

Acked-by: Jingoo Han <jg1.han@...sung.com>

A few days ago, I noticed that irq_data_get_msi() can be used.
However, I did not submit the same patch. I really appreciate
your patch. :-)

Best regards,
Jingoo Han

> ---
>  drivers/pci/host/pcie-designware.c |    4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> Index: tip/drivers/pci/host/pcie-designware.c
> ===================================================================
> --- tip.orig/drivers/pci/host/pcie-designware.c
> +++ tip/drivers/pci/host/pcie-designware.c
> @@ -294,14 +294,12 @@ no_valid_irq:
>  static void clear_irq(unsigned int irq)
>  {
>  	unsigned int pos, nvec;
> -	struct irq_desc *desc;
>  	struct msi_desc *msi;
>  	struct pcie_port *pp;
>  	struct irq_data *data = irq_get_irq_data(irq);
> 
>  	/* get the port structure */
> -	desc = irq_to_desc(irq);
> -	msi = irq_desc_get_msi_desc(desc);
> +	msi = irq_data_get_msi(data);
>  	pp = sys_to_pcie(msi->dev->bus->sysdata);
>  	if (!pp) {
>  		BUG();