From patchwork Sun May 8 10:59:55 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Niklas_S=C3=B6derlund?= X-Patchwork-Id: 9038771 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id BB74C9F1C1 for ; Sun, 8 May 2016 11:05:00 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E86B520125 for ; Sun, 8 May 2016 11:04:59 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 15D7720120 for ; Sun, 8 May 2016 11:04:59 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1azMU5-0004tb-86; Sun, 08 May 2016 11:02:49 +0000 Received: from smtp-3.sys.kth.se ([2001:6b0:1:1300:250:56ff:fea6:2de2]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1azMU1-0004qk-DS for linux-arm-kernel@lists.infradead.org; Sun, 08 May 2016 11:02:46 +0000 Received: from smtp-3.sys.kth.se (localhost.localdomain [127.0.0.1]) by smtp-3.sys.kth.se (Postfix) with ESMTP id E76A62735; Sun, 8 May 2016 13:02:24 +0200 (CEST) X-Virus-Scanned: by amavisd-new at kth.se Received: from smtp-3.sys.kth.se ([127.0.0.1]) by smtp-3.sys.kth.se (smtp-3.sys.kth.se [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 5w1Oxqf6e2Xy; Sun, 8 May 2016 13:02:24 +0200 (CEST) X-KTH-Auth: niso [89.233.230.99] X-KTH-mail-from: niklas.soderlund+renesas@ragnatech.se Received: from bismarck.berto.se (dynamic.0.6.79d1f80.14cc20ac3a53.cust.bredband2.com [89.233.230.99]) by smtp-3.sys.kth.se (Postfix) with ESMTPSA id C7295237F; Sun, 8 May 2016 13:02:23 +0200 (CEST) From: =?UTF-8?q?Niklas=20S=C3=B6derlund?= To: linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, dmaengine@vger.kernel.org Subject: [PATCH 1/2] dma-mapping: add __dma_sync_single_for_device() Date: Sun, 8 May 2016 12:59:55 +0200 Message-Id: <1462705196-10857-2-git-send-email-niklas.soderlund+renesas@ragnatech.se> X-Mailer: git-send-email 2.8.2 In-Reply-To: <1462705196-10857-1-git-send-email-niklas.soderlund+renesas@ragnatech.se> References: <1462705196-10857-1-git-send-email-niklas.soderlund+renesas@ragnatech.se> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160508_040245_642173_25213EC0 X-CRM114-Status: UNSURE ( 8.98 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -3.5 (---) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?Niklas=20S=C3=B6derlund?= , joro@8bytes.org, will.deacon@arm.com, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, robin.murphy@arm.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-6.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 Some users of the DMA mapping API calls dma_sync_single_for_device() from the dma_map_single() call path. This will cause false warning printouts if CONFIG_DMA_API_DEBUG are enabled. The reason for the warning are that debug_dma_sync_single_for_device() will be called before debug_dma_map_page() so the new mapping can't be found and are believed to be invalid. Add __dma_sync_single_for_device() that don't call into debug_dma_sync_single_for_device() and can be used in these situations. Signed-off-by: Niklas Söderlund --- include/linux/dma-mapping.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 9ea9aba..0e4d3a6 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -224,7 +224,7 @@ static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, debug_dma_sync_single_for_cpu(dev, addr, size, dir); } -static inline void dma_sync_single_for_device(struct device *dev, +static inline void __dma_sync_single_for_device(struct device *dev, dma_addr_t addr, size_t size, enum dma_data_direction dir) { @@ -233,6 +233,13 @@ static inline void dma_sync_single_for_device(struct device *dev, BUG_ON(!valid_dma_direction(dir)); if (ops->sync_single_for_device) ops->sync_single_for_device(dev, addr, size, dir); +} + +static inline void dma_sync_single_for_device(struct device *dev, + dma_addr_t addr, size_t size, + enum dma_data_direction dir) +{ + __dma_sync_single_for_device(dev, addr, size, dir); debug_dma_sync_single_for_device(dev, addr, size, dir); }