linux-kernel - Re: [PATCH V2] PCI: exynos: add support for MSI

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Message-ID: <20130829034508.GA3025@pratyush-vbox>
Date:	Thu, 29 Aug 2013 09:15:08 +0530
From:	Pratyush Anand <pratyush.anand@...com>
To:	Jingoo Han <jg1.han@...sung.com>
Cc:	'Bjorn Helgaas' <bhelgaas@...gle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>,
	'Kukjin Kim' <kgene.kim@...sung.com>,
	Mohit KUMAR DCG <Mohit.KUMAR@...com>,
	'Siva Reddy Kallam' <siva.kallam@...sung.com>,
	'SRIKANTH TUMKUR SHIVANAND' <ts.srikanth@...sung.com>,
	'Arnd Bergmann' <arnd@...db.de>,
	'Sean Cross' <xobs@...agi.com>,
	'Kishon Vijay Abraham I' <kishon@...com>,
	'Thierry Reding' <thierry.reding@...il.com>,
	'Thomas Petazzoni' <thomas.petazzoni@...e-electrons.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH V2] PCI: exynos: add support for MSI

On Wed, Aug 28, 2013 at 04:17:24PM +0800, Jingoo Han wrote:
> On Friday, August 23, 2013 5:36 PM, Pratyush Anand wrote:
> > On Fri, Aug 23, 2013 at 02:04:20PM +0800, Jingoo Han wrote:
> 

[...]

> > #define MAX_PCIE_PORT_SUPPORTED 3
> > static DECLARE_BITMAP(msi_irq_in_use[MAX_PCIE_PORT_SUPPORTED],
> >                   NUM_MSI_IRQS);
> > static unsigned int *msi_data[MAX_PCIE_PORT_SUPPORTED];
> 
> No, there is no need to do it.
> Without this, we can use 3 RCs by adding a node of 3rd RC to dt file.
> 

Yes, you can use RCs by adding nodes to dt file. But you will need one 
msi_irq_in_use and one msi_data per RC (ie per port in this driver), isn't it? 

Regards
Pratyush

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