From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com ([192.55.52.88]:54280 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934375AbaEFHFN (ORCPT ); Tue, 6 May 2014 03:05:13 -0400 From: Jiang Liu To: Joerg Roedel , David Woodhouse , Yinghai Lu , Bjorn Helgaas , Dan Williams , Vinod Koul , "Rafael J . Wysocki" Cc: Jiang Liu , Ashok Raj , Yijing Wang , Tony Luck , iommu@lists.linux-foundation.org, linux-pci@vger.kernel.org, linux-hotplug@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org Subject: [Patch Part3 V2 19/21] iommu/vt-d: enhance error recovery in function intel_enable_irq_remapping() Date: Tue, 6 May 2014 15:05:30 +0800 Message-Id: <1399359932-28972-20-git-send-email-jiang.liu@linux.intel.com> In-Reply-To: <1399359932-28972-1-git-send-email-jiang.liu@linux.intel.com> References: <1399359932-28972-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-pci-owner@vger.kernel.org List-ID: Enhance error recovery in function intel_enable_irq_remapping() by tearing down all created data structures. Signed-off-by: Jiang Liu --- drivers/iommu/intel_irq_remapping.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index 9f1c86566452..f65b68d3de10 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -673,9 +673,11 @@ static int __init intel_enable_irq_remapping(void) return eim ? IRQ_REMAP_X2APIC_MODE : IRQ_REMAP_XAPIC_MODE; error: - /* - * handle error condition gracefully here! - */ + for_each_iommu(iommu, drhd) + if (ecap_ir_support(iommu->ecap)) { + iommu_disable_irq_remapping(iommu); + intel_teardown_irq_remapping(iommu); + } if (x2apic_present) pr_warn("Failed to enable irq remapping. You are vulnerable to irq-injection attacks.\n"); -- 1.7.10.4