Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932098AbbFMGtM (ORCPT ); Sat, 13 Jun 2015 02:49:12 -0400 Received: from 8bytes.org ([81.169.241.247]:51450 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751988AbbFMGr6 (ORCPT ); Sat, 13 Jun 2015 02:47:58 -0400 From: Joerg Roedel To: iommu@lists.linux-foundation.org Cc: David Woodhouse , zhen-hual@hp.com, bhe@redhat.com, ddutile@redhat.com, alex.williamson@redhat.com, dyoung@redhat.com, linux-kernel@vger.kernel.org, jroedel@8bytes.org, joro@8bytes.org, Joerg Roedel Subject: [PATCH 19/19] iommu/vt-d: Don't disable IR when it was previously enabled Date: Sat, 13 Jun 2015 08:47:27 +0200 Message-Id: <1434178047-17809-20-git-send-email-joro@8bytes.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1434178047-17809-1-git-send-email-joro@8bytes.org> References: <1434178047-17809-1-git-send-email-joro@8bytes.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1270 Lines: 42 From: Joerg Roedel Keep it enabled in kdump kernel to guarantee interrupt delivery. Signed-off-by: Joerg Roedel --- drivers/iommu/intel_irq_remapping.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index 14e10de..47fcebf 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -742,9 +742,6 @@ static int __init intel_prepare_irq_remapping(void) pr_info("%s does not support EIM\n", iommu->name); eim = 0; } - - /* Disable IRQ remapping if it is already enabled */ - iommu_disable_irq_remapping(iommu); } eim_mode = eim; @@ -777,7 +774,8 @@ static int __init intel_enable_irq_remapping(void) * Setup Interrupt-remapping for all the DRHD's now. */ for_each_iommu(iommu, drhd) { - iommu_enable_irq_remapping(iommu); + if (!ir_pre_enabled(iommu)) + iommu_enable_irq_remapping(iommu); setup = true; } -- 1.9.1 -- 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/