linux-kernel - PCIe MSI address is not written at pci_enable_msi

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Message-ID: <8520D5D51A55D047800579B094147198258B8102@XAP-PVEXMBX01.xlnx.xilinx.com>
Date:	Mon, 11 Jul 2016 02:37:37 +0000
From:	Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
CC:	Arnd Bergmann <arnd@...db.de>, Bjorn Helgaas <bhelgaas@...gle.com>,
	nofooter <nofooter@...inx.com>,
	"marc.zyngier@....com" <marc.zyngier@....com>
Subject: PCIe MSI address is not written at pci_enable_msi_range call

Hi,

I have a query.
I see that when we use PCI_MSI_IRQ_DOMAIN to handle MSI's, MSI address is not being
written in to end point's PCI_MSI_ADDRESS_LO/HI at the call pci_enable_msi_range.

Instead it is being written at the time end point requests irq.

Can any one tell the reason why is it handled in this manner ?

Correct me If my observation is wrong.

Thanks & Regards,
Bharat

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