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Date: Wed, 4 Jan 2017 23:09:06 +0530 From: valmiki <valmikibow@...il.com> To: linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org Cc: helgaas@...nel.org, marc.zyngier@....com, arnd@...db.de, mark.rutland@....com Subject: Need clarity on MSI handling in RC driver Hi All, I have a doubt, the MSI domains are handled differently in different RC drivers. Some drivers use irq_domain_add_linear alone, and some use pci_msi_create_irq_domain also to handle MSI. In most of the 32-bit architectures only irq_domain_add_linear is used and in 64 bit drivers both pci_msi_create_irq_domain and irq_domain_add_linear are used. So is this because of architecture difference between ARM and ARM64 ? Thanks & Regards, valmiki
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