From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932513AbbFEFxz (ORCPT ); Fri, 5 Jun 2015 01:53:55 -0400 Received: from mga02.intel.com ([134.134.136.20]:33935 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932378AbbFEFwe (ORCPT ); Fri, 5 Jun 2015 01:52:34 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,556,1427785200"; d="scan'208";a="705724158" From: Feng Wu To: joro@8bytes.org, dwmw2@infradead.org, tglx@linutronix.de Cc: jiang.liu@linux.intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Feng Wu Subject: [v9 9/9] iommu, x86: Properly handler PI for IOMMU hotplug Date: Fri, 5 Jun 2015 13:42:54 +0800 Message-Id: <1433482974-14614-10-git-send-email-feng.wu@intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1433482974-14614-1-git-send-email-feng.wu@intel.com> References: <1433482974-14614-1-git-send-email-feng.wu@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return error when inserting a new IOMMU which doesn't support PI if PI is currently in use. Signed-off-by: Feng Wu --- drivers/iommu/intel_irq_remapping.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index 554e203..4fb3576 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -1360,6 +1360,9 @@ int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert) return -EINVAL; if (!ecap_ir_support(iommu->ecap)) return 0; + if (irq_remapping_cap(IRQ_POSTING_CAP) && + !cap_pi_support(iommu->cap)) + return -EBUSY; if (insert) { if (!iommu->ir_table) -- 2.1.0