From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752514AbbE0EPy (ORCPT ); Wed, 27 May 2015 00:15:54 -0400 Received: from mga03.intel.com ([134.134.136.65]:14015 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752394AbbE0EPU (ORCPT ); Wed, 27 May 2015 00:15:20 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,502,1427785200"; d="scan'208";a="498690536" From: Feng Wu To: joro@8bytes.org, dwmw2@infradead.org Cc: tglx@linutronix.de, jiang.liu@linux.intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Feng Wu Subject: [v8 9/9] iommu, x86: Properly handler PI for IOMMU hotplug Date: Wed, 27 May 2015 12:05:44 +0800 Message-Id: <1432699544-17444-10-git-send-email-feng.wu@intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1432699544-17444-1-git-send-email-feng.wu@intel.com> References: <1432699544-17444-1-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 c21a2a9..1f35d0b 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -1363,6 +1363,9 @@ 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