Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752894AbbGWNMf (ORCPT ); Thu, 23 Jul 2015 09:12:35 -0400 Received: from mail-ig0-f180.google.com ([209.85.213.180]:34374 "EHLO mail-ig0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752321AbbGWNM1 (ORCPT ); Thu, 23 Jul 2015 09:12:27 -0400 Date: Thu, 23 Jul 2015 08:12:21 -0500 From: Bjorn Helgaas To: Marc Zyngier Cc: Thomas Gleixner , Jiang Liu , Jason Cooper , linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Yijing Wang , Ma Jun , Lorenzo Pieralisi , Duc Dang Subject: Re: [PATCH v5 05/19] PCI/MSI: of: Add support for OF-provided msi_domain Message-ID: <20150723131221.GS21967@google.com> References: <1437643598-19795-1-git-send-email-marc.zyngier@arm.com> <1437643598-19795-6-git-send-email-marc.zyngier@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1437643598-19795-6-git-send-email-marc.zyngier@arm.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1600 Lines: 58 On Thu, Jul 23, 2015 at 10:26:24AM +0100, Marc Zyngier wrote: > In order to populate the PCI host bridge msi_domain, use the > "msi-parent" attribute to lookup a corresponding irq domain. > If found, this is our MSI domain. > > This gets plugged into the core PCI code. > > Signed-off-by: Marc Zyngier Acked-by: Bjorn Helgaas > +struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus) > +{ > +#ifdef CONFIG_IRQ_DOMAIN > + struct device_node *np; > + struct irq_domain *d; > + > + if (!bus->dev.of_node) > + return NULL; > + np = of_parse_phandle(bus->dev.of_node, "msi-parent", 0); > + if (!np) > + return NULL; > + d = irq_find_matching_host(np, DOMAIN_BUS_PCI_MSI); > + if (!d) > + d = irq_find_host(np); > + return d; d = irq_find_matching_host(np, DOMAIN_BUS_PCI_MSI); if (d) return d; return irq_find_host(np); > +#else > + return NULL; > +#endif > static struct irq_domain *pci_host_bridge_msi_domain(struct pci_bus *bus) > { > + struct irq_domain *d; > + > /* > * Any firmware interface that can resolve the msi_domain > * should be called from here. > */ > + d = pci_host_bridge_of_msi_domain(bus); > > - return NULL; > + return d; No temporary needed (until there's another firmware interface): return pci_host_bridge_of_msi_domain(bus); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/