Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932766AbbFIFbS (ORCPT ); Tue, 9 Jun 2015 01:31:18 -0400 Received: from mga01.intel.com ([192.55.52.88]:8473 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932242AbbFIFa1 (ORCPT ); Tue, 9 Jun 2015 01:30:27 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,577,1427785200"; d="scan'208";a="743415032" 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: [v10 10/10] iommu, x86: Properly handle posted interrupts for IOMMU hotplug Date: Tue, 9 Jun 2015 13:20:37 +0800 Message-Id: <1433827237-3382-11-git-send-email-feng.wu@intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1433827237-3382-1-git-send-email-feng.wu@intel.com> References: <1433827237-3382-1-git-send-email-feng.wu@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1091 Lines: 32 Return error when inserting a new IOMMU which doesn't support posted interrupts if posted interrupts are already enabled. Signed-off-by: Feng Wu Reviewed-by: Thomas Gleixner Acked-by: Joerg Roedel --- 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 0f57af7..80f1d14 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -1355,6 +1355,9 @@ 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 -- 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/