From patchwork Tue Apr 22 07:07:20 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiang Liu X-Patchwork-Id: 4028891 Return-Path: X-Original-To: patchwork-dmaengine@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B369ABFF02 for ; Tue, 22 Apr 2014 07:06:30 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E92382021B for ; Tue, 22 Apr 2014 07:06:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CA00D20219 for ; Tue, 22 Apr 2014 07:06:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752112AbaDVHGR (ORCPT ); Tue, 22 Apr 2014 03:06:17 -0400 Received: from mga01.intel.com ([192.55.52.88]:49778 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752990AbaDVHGO (ORCPT ); Tue, 22 Apr 2014 03:06:14 -0400 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP; 22 Apr 2014 00:06:13 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,902,1389772800"; d="scan'208";a="517081889" Received: from gerry-dev.bj.intel.com ([10.238.158.74]) by fmsmga001.fm.intel.com with ESMTP; 22 Apr 2014 00:06:04 -0700 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-kernel@vger.kernel.org, dmaengine@vger.kernel.org Subject: [Patch Part3 V1 09/22] iommu/vt-d: change iommu_enable/disable_translation to return void Date: Tue, 22 Apr 2014 15:07:20 +0800 Message-Id: <1398150453-28141-10-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1398150453-28141-1-git-send-email-jiang.liu@linux.intel.com> References: <1398150453-28141-1-git-send-email-jiang.liu@linux.intel.com> Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Simplify error handling path by changing iommu_{enable|disable}_translation to return void. Signed-off-by: Jiang Liu --- drivers/iommu/intel-iommu.c | 18 +++++------------- 1 file changed, 5 insertions(+), 13 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 5e865c1265ad..75d7c5e3f77d 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -1391,7 +1391,7 @@ static void iommu_disable_protect_mem_regions(struct intel_iommu *iommu) raw_spin_unlock_irqrestore(&iommu->register_lock, flags); } -static int iommu_enable_translation(struct intel_iommu *iommu) +static void iommu_enable_translation(struct intel_iommu *iommu) { u32 sts; unsigned long flags; @@ -1405,10 +1405,9 @@ static int iommu_enable_translation(struct intel_iommu *iommu) readl, (sts & DMA_GSTS_TES), sts); raw_spin_unlock_irqrestore(&iommu->register_lock, flags); - return 0; } -static int iommu_disable_translation(struct intel_iommu *iommu) +static void iommu_disable_translation(struct intel_iommu *iommu) { u32 sts; unsigned long flag; @@ -1422,7 +1421,6 @@ static int iommu_disable_translation(struct intel_iommu *iommu) readl, (!(sts & DMA_GSTS_TES)), sts); raw_spin_unlock_irqrestore(&iommu->register_lock, flag); - return 0; } @@ -2875,11 +2873,7 @@ static int __init init_dmars(void) iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL); iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); - - ret = iommu_enable_translation(iommu); - if (ret) - goto free_iommu; - + iommu_enable_translation(iommu); iommu_disable_protect_mem_regions(iommu); } @@ -3577,10 +3571,8 @@ static int init_iommu_hw(void) iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL); - iommu->flush.flush_iotlb(iommu, 0, 0, 0, - DMA_TLB_GLOBAL_FLUSH); - if (iommu_enable_translation(iommu)) - return 1; + iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); + iommu_enable_translation(iommu); iommu_disable_protect_mem_regions(iommu); }