From patchwork Fri Nov 6 22:35:41 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Busch X-Patchwork-Id: 7574081 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5CEAEC05C6 for ; Fri, 6 Nov 2015 22:44:06 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8EC622069A for ; Fri, 6 Nov 2015 22:44:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AC2392060A for ; Fri, 6 Nov 2015 22:44:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757835AbbKFWn0 (ORCPT ); Fri, 6 Nov 2015 17:43:26 -0500 Received: from mga02.intel.com ([134.134.136.20]:29742 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757693AbbKFWmB (ORCPT ); Fri, 6 Nov 2015 17:42:01 -0500 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP; 06 Nov 2015 14:42:01 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,254,1444719600"; d="scan'208";a="844569408" Received: from dcgshare.lm.intel.com ([10.232.118.254]) by orsmga002.jf.intel.com with ESMTP; 06 Nov 2015 14:42:00 -0800 Received: by dcgshare.lm.intel.com (Postfix, from userid 1017) id 2990FE0C68; Fri, 6 Nov 2015 15:41:59 -0700 (MST) From: Keith Busch To: LKML , x86@kernel.org, linux-pci@vger.kernel.org Cc: Jiang Liu , Thomas Gleixner , Dan Williams , Bjorn Helgaas , Bryan Veal , Ingo Molnar , "H. Peter Anvin" , Martin Mares , Jon Derrick Subject: [PATCHv4 1/6] msi: Relax msi_domain_alloc() to support parentless MSI irqdomains Date: Fri, 6 Nov 2015 15:35:41 -0700 Message-Id: <1446849346-8242-2-git-send-email-keith.busch@intel.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1446849346-8242-1-git-send-email-keith.busch@intel.com> References: <1446849346-8242-1-git-send-email-keith.busch@intel.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Liu Jiang Previously msi_domain_alloc() assumes MSI irqdomains always have parent irqdomains, but that's not true for the new Intel VMD devices. So relax msi_domain_alloc() to support parentless MSI irqdomains. Signed-off-by: Jiang Liu Signed-off-by: Liu Jiang --- kernel/irq/msi.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index be9149f..01644d4 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -109,9 +109,11 @@ static int msi_domain_alloc(struct irq_domain *domain, unsigned int virq, if (irq_find_mapping(domain, hwirq) > 0) return -EEXIST; - ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg); - if (ret < 0) - return ret; + if (domain->parent) { + ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg); + if (ret < 0) + return ret; + } for (i = 0; i < nr_irqs; i++) { ret = ops->msi_init(domain, info, virq + i, hwirq + i, arg);