From patchwork Thu Nov 22 14:03:17 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10694293 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 204711709 for ; Thu, 22 Nov 2018 14:07:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0FDE52BCD7 for ; Thu, 22 Nov 2018 14:07:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 03A4C2CCBF; Thu, 22 Nov 2018 14:07:28 +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=-3.6 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_LOW autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A53EF2BCD7 for ; Thu, 22 Nov 2018 14:07:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=vqhj1y/9sJ2OoQ34XhQjVFAjZmL7wCmgn54xBv7y7pY=; b=VFQPsdyMsIj82M ZO+n35dq18ei7ubXTtktzsQ/KJEhGHb9W36Sh8vvTr/2I7uwvmMtNgCV/upuz3Stj0rf0AR5DPli9 zZoCErw3SVmA887+tq02B37AqSJyJ8bgJriDvVwXpiKON8/9qTNXE0Fkj4gmAPyMZHFL2tjG2aoZ2 qEJBATAQMJ3+3Ee8nEm7kc9w7ntiI2n90Giw0ZcLtOfU1wM2lbFKJn+WtRpHL8sGRLaVMTUUhZYLo ahtCxe8d5x+JzmFV6FUB5cjep0Bn+X/7jU6xIPmGo3zzMdnBc1ZMIp7+qCUW8z3+9lQB1iOUnYNOq EnyAHxRJqal7rAYiubfQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gPpde-0005ay-KR; Thu, 22 Nov 2018 14:07:26 +0000 Received: from clnet-p19-102.ikbnet.co.at ([83.175.77.102] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gPpal-0000Qq-Dd; Thu, 22 Nov 2018 14:04:27 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org Subject: [PATCH 21/24] iommu/vt-d: remove the mapping_error dma_map_ops method Date: Thu, 22 Nov 2018 15:03:17 +0100 Message-Id: <20181122140320.24080-22-hch@lst.de> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181122140320.24080-1-hch@lst.de> References: <20181122140320.24080-1-hch@lst.de> MIME-Version: 1.0 X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, linux-alpha@vger.kernel.org, linux-ia64@vger.kernel.org, linux-parisc@vger.kernel.org, Linus Torvalds , Joerg Roedel , x86@kernel.org, Robin Murphy , linux-kernel@vger.kernel.org, Jon Mason , xen-devel@lists.xenproject.org, David Woodhouse , linux-arm-kernel@lists.infradead.org, Marek Szyprowski Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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 3b8a7acac7a1..a5704155932d 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, };