linux-kernel - Re: [PATCH v5 04/19] PCI/MSI: Add hooks to populate the msi

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Date:	Thu, 23 Jul 2015 15:52:40 +0100
From:	Marc Zyngier <marc.zyngier@....com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Jason Cooper <jason@...edaemon.net>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Yijing Wang <wangyijing@...wei.com>,
	Ma Jun <majun258@...wei.com>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Duc Dang <dhdang@....com>
Subject: Re: [PATCH v5 04/19] PCI/MSI: Add hooks to populate the msi_domain
 field

On 23/07/15 14:06, Bjorn Helgaas wrote:
> On Thu, Jul 23, 2015 at 10:26:23AM +0100, Marc Zyngier wrote:
>> In order to be able to populate the device msi_domain field,
>> add the necessary hooks to propagate the host bridge msi_domain
>> across secondary busses to devices.
>>
>> So far, nobody populates the initial msi_domain.
>>
>> Signed-off-by: Marc Zyngier <marc.zyngier@....com>
> 
> Acked-by: Bjorn Helgaas <bhelgaas@...gle.com>
> 
>> +static void pci_set_msi_domain(struct pci_dev *dev)
>> +{
>> +	/*
>> +	 * If no domain has been set through the pcibios callback,
>> +	 * inherit the default from the bus device.
> 
> Nit: there isn't a pcibios callback anymore.

There is actually one, in pci_add_device:

	[...]
	ret = pcibios_add_device(dev);
	WARN_ON(ret < 0);

	/* Setup MSI irq domain */
	pci_set_msi_domain(dev);
	[...]

pcibios_add_device is the one I was referring to. I'll clarify the comment.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...
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