From patchwork Fri Nov 30 13:22:27 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10706261 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3722113A4 for ; Fri, 30 Nov 2018 13:24:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 271682D17F for ; Fri, 30 Nov 2018 13:24:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1B9E42E528; Fri, 30 Nov 2018 13:24:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B34B82D17F for ; Fri, 30 Nov 2018 13:24:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727467AbeLAAdW (ORCPT ); Fri, 30 Nov 2018 19:33:22 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:49640 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726802AbeLAAdV (ORCPT ); Fri, 30 Nov 2018 19:33:21 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=uo0Q98winaBB83hkbU/s9+bS7uoJBORh6pgs2ABTT38=; b=dgMw0L6L2cMJMv+i2XyQpaW0Ub qoLAa69Dpwo4bL6bY/Mdq6WJrewp2Vbo2R1v+1tsagN8mWTUI5sgH9E7d3KBMBsIzygVEpTatecQN O4SiwOsShrUi6rpeyGzgaM9cRqIhBpzkjgTzasXWr8v/HI5XVVpnSu8BZqg1bkQPkRPPoB3MmjCkA 15PqNGJCaTzKlEoGt6uvuGiwdgUtNTT/8zbCECg+921wvraD2W5Vx5VVN7eHfWG6I4/2RpBIrigo0 vnrAW1rngT8mQ6KBODix0GY4BMr70MuArKZmqnj78/1uh8sXRy1e1xIzYDDfIJN7w6mIvgB3bPp1n 51XSJnMw==; Received: from 089144206221.atnat0015.highway.bob.at ([89.144.206.221] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gSilw-0004zL-AT; Fri, 30 Nov 2018 13:23:56 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org Cc: Linus Torvalds , Jon Mason , Joerg Roedel , David Woodhouse , Marek Szyprowski , Robin Murphy , x86@kernel.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-parisc@vger.kernel.org, xen-devel@lists.xenproject.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 19/23] iommu/vt-d: remove the mapping_error dma_map_ops method Date: Fri, 30 Nov 2018 14:22:27 +0100 Message-Id: <20181130132231.16512-20-hch@lst.de> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181130132231.16512-1-hch@lst.de> References: <20181130132231.16512-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Return DMA_MAPPING_ERROR instead of 0 on a dma mapping failure and let the core dma-mapping code handle the rest. Signed-off-by: Christoph Hellwig --- drivers/iommu/intel-iommu.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 66b4444398ae..0ad67d65bbce 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3617,7 +3617,7 @@ static dma_addr_t __intel_map_page(struct device *dev, struct page *page, domain = get_valid_domain_for_dev(dev); if (!domain) - return 0; + return DMA_MAPPING_ERROR; iommu = domain_get_iommu(domain); size = aligned_nrpages(paddr, size); @@ -3655,7 +3655,7 @@ static dma_addr_t __intel_map_page(struct device *dev, struct page *page, free_iova_fast(&domain->iovad, iova_pfn, dma_to_mm_pfn(size)); pr_err("Device %s request: %zx@%llx dir %d --- failed\n", dev_name(dev), size, (unsigned long long)paddr, dir); - return 0; + return DMA_MAPPING_ERROR; } static dma_addr_t intel_map_page(struct device *dev, struct page *page, @@ -3756,7 +3756,7 @@ static void *intel_alloc_coherent(struct device *dev, size_t size, *dma_handle = __intel_map_page(dev, page, 0, size, DMA_BIDIRECTIONAL, dev->coherent_dma_mask); - if (*dma_handle) + if (*dma_handle != DMA_MAPPING_ERROR) return page_address(page); if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT)) __free_pages(page, order); @@ -3865,11 +3865,6 @@ static int intel_map_sg(struct device *dev, struct scatterlist *sglist, int nele return nelems; } -static int intel_mapping_error(struct device *dev, dma_addr_t dma_addr) -{ - return !dma_addr; -} - static const struct dma_map_ops intel_dma_ops = { .alloc = intel_alloc_coherent, .free = intel_free_coherent, @@ -3877,7 +3872,6 @@ static const struct dma_map_ops intel_dma_ops = { .unmap_sg = intel_unmap_sg, .map_page = intel_map_page, .unmap_page = intel_unmap_page, - .mapping_error = intel_mapping_error, .dma_supported = dma_direct_supported, };