From patchwork Thu May 13 22:31:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 12256781 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BF481C43460 for ; Thu, 13 May 2021 22:32:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 99FE661435 for ; Thu, 13 May 2021 22:32:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233815AbhEMWdp (ORCPT ); Thu, 13 May 2021 18:33:45 -0400 Received: from ale.deltatee.com ([204.191.154.188]:59216 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230213AbhEMWde (ORCPT ); Thu, 13 May 2021 18:33:34 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=deltatee.com; s=20200525; h=Subject:MIME-Version:References:In-Reply-To: Message-Id:Date:Cc:To:From:content-disposition; bh=8cZgBhr0Anv3Gd0FTXDyBK4ezUzJ6Tr6W4sIgchu1Qw=; b=AUNDX9/y6tYezRRfrqP5yxg7z1 BC2HKE/th8j2APTmC0Jca7xFx7wMPgR3kzTM+HmPCRyRt8+u8FAqs5ghp+ivuYi9pRvXwyy1HxVqB oHQyCVYR0/+PledAYETok41jxSB+kMmiP+LInOi3xvFuKM3uuqYV1/ivDKJIJcAvfo1WrPyJITnAS yPt8WJApIz1349JThkaHjy2sgnp7t8Mm656nCS4OHvDIpJ18n4AJ5kyfkAukJr8ZjwU9HtBHYqRkb 9MfP9N8QexopsKQGu/HoUeAh3ExiwG/8UzTufgkNDYfrLbNzS+xK++tRpU5KW6EdPIET8BjypLTHw yUzlCZRA==; Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lhJsV-0000nC-1E; Thu, 13 May 2021 16:32:23 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1lhJsH-0001Sz-Ap; Thu, 13 May 2021 16:32:09 -0600 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org Cc: Stephen Bates , Christoph Hellwig , Dan Williams , Jason Gunthorpe , =?utf-8?q?Christian_K=C3=B6nig?= , John Hubbard , Don Dutile , Matthew Wilcox , Daniel Vetter , Jakowski Andrzej , Minturn Dave B , Jason Ekstrand , Dave Hansen , Xiong Jianxin , Bjorn Helgaas , Ira Weiny , Robin Murphy , Logan Gunthorpe Date: Thu, 13 May 2021 16:31:52 -0600 Message-Id: <20210513223203.5542-12-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210513223203.5542-1-logang@deltatee.com> References: <20210513223203.5542-1-logang@deltatee.com> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, sbates@raithlin.com, hch@lst.de, jgg@ziepe.ca, christian.koenig@amd.com, jhubbard@nvidia.com, ddutile@redhat.com, willy@infradead.org, daniel.vetter@ffwll.ch, jason@jlekstrand.net, dave.hansen@linux.intel.com, helgaas@kernel.org, dan.j.williams@intel.com, andrzej.jakowski@intel.com, dave.b.minturn@intel.com, jianxin.xiong@intel.com, ira.weiny@intel.com, robin.murphy@arm.com, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [PATCH v2 11/22] dma-iommu: Return error code from iommu_dma_map_sg() X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Pass through appropriate error codes from iommu_dma_map_sg() now that the error code will be passed through dma_map_sgtable(). Signed-off-by: Logan Gunthorpe --- drivers/iommu/dma-iommu.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 7bcdd1205535..0d69f509a95d 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -970,7 +970,7 @@ static int iommu_dma_map_sg_swiotlb(struct device *dev, struct scatterlist *sg, out_unmap: iommu_dma_unmap_sg_swiotlb(dev, sg, i, dir, attrs | DMA_ATTR_SKIP_CPU_SYNC); - return 0; + return -EINVAL; } /* @@ -991,11 +991,14 @@ static int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg, dma_addr_t iova; size_t iova_len = 0; unsigned long mask = dma_get_seg_boundary(dev); + ssize_t ret; int i; - if (static_branch_unlikely(&iommu_deferred_attach_enabled) && - iommu_deferred_attach(dev, domain)) - return 0; + if (static_branch_unlikely(&iommu_deferred_attach_enabled)) { + ret = iommu_deferred_attach(dev, domain); + if (ret) + return ret; + } if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) iommu_dma_sync_sg_for_device(dev, sg, nents, dir); @@ -1043,14 +1046,17 @@ static int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg, } iova = iommu_dma_alloc_iova(domain, iova_len, dma_get_mask(dev), dev); - if (!iova) + if (!iova) { + ret = -ENOMEM; goto out_restore_sg; + } /* * We'll leave any physical concatenation to the IOMMU driver's * implementation - it knows better than we do. */ - if (iommu_map_sg_atomic(domain, iova, sg, nents, prot) < iova_len) + ret = iommu_map_sg_atomic(domain, iova, sg, nents, prot); + if (ret < iova_len) goto out_free_iova; return __finalise_sg(dev, sg, nents, iova); @@ -1059,7 +1065,7 @@ static int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg, iommu_dma_free_iova(cookie, iova, iova_len, NULL); out_restore_sg: __invalidate_sg(sg, nents); - return 0; + return ret; } static void iommu_dma_unmap_sg(struct device *dev, struct scatterlist *sg,