From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 A2BABC00319 for ; Tue, 5 Mar 2019 17:54:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 72A5920643 for ; Tue, 5 Mar 2019 17:54:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730802AbfCERyv (ORCPT ); Tue, 5 Mar 2019 12:54:51 -0500 Received: from sauhun.de ([88.99.104.3]:36290 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730674AbfCERyu (ORCPT ); Tue, 5 Mar 2019 12:54:50 -0500 Received: from localhost (p54B3334F.dip0.t-ipconnect.de [84.179.51.79]) by pokefinder.org (Postfix) with ESMTPSA id BB9052E3564; Tue, 5 Mar 2019 18:54:48 +0100 (CET) From: Wolfram Sang To: linux-i2c@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda , Wolfram Sang Subject: [PATCH 2/3] i2c: rcar: let DMA enable routine return success status Date: Tue, 5 Mar 2019 18:54:33 +0100 Message-Id: <20190305175434.13107-3-wsa+renesas@sang-engineering.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190305175434.13107-1-wsa+renesas@sang-engineering.com> References: <20190305175434.13107-1-wsa+renesas@sang-engineering.com> Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org We will need to know if enabling DMA was successful in a later patch. Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-rcar.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 925858915569..7e009febe97f 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -399,7 +399,7 @@ static void rcar_i2c_dma_callback(void *data) rcar_i2c_dma_unmap(priv); } -static void rcar_i2c_dma(struct rcar_i2c_priv *priv) +static bool rcar_i2c_dma(struct rcar_i2c_priv *priv) { struct device *dev = rcar_i2c_priv_to_dev(priv); struct i2c_msg *msg = priv->msg; @@ -415,7 +415,7 @@ static void rcar_i2c_dma(struct rcar_i2c_priv *priv) /* Do various checks to see if DMA is feasible at all */ if (IS_ERR(chan) || msg->len < RCAR_MIN_DMA_LEN || !(msg->flags & I2C_M_DMA_SAFE) || (read && priv->flags & ID_P_NO_RXDMA)) - return; + return false; if (read) { /* @@ -435,7 +435,7 @@ static void rcar_i2c_dma(struct rcar_i2c_priv *priv) dma_addr = dma_map_single(chan->device->dev, buf, len, dir); if (dma_mapping_error(chan->device->dev, dma_addr)) { dev_dbg(dev, "dma map failed, using PIO\n"); - return; + return false; } sg_dma_len(&priv->sg) = len; @@ -449,7 +449,7 @@ static void rcar_i2c_dma(struct rcar_i2c_priv *priv) if (!txdesc) { dev_dbg(dev, "dma prep slave sg failed, using PIO\n"); rcar_i2c_cleanup_dma(priv); - return; + return false; } txdesc->callback = rcar_i2c_dma_callback; @@ -459,7 +459,7 @@ static void rcar_i2c_dma(struct rcar_i2c_priv *priv) if (dma_submit_error(cookie)) { dev_dbg(dev, "submitting dma failed, using PIO\n"); rcar_i2c_cleanup_dma(priv); - return; + return false; } /* Enable DMA Master Received/Transmitted */ @@ -469,6 +469,7 @@ static void rcar_i2c_dma(struct rcar_i2c_priv *priv) rcar_i2c_write(priv, ICDMAER, TMDMAE); dma_async_issue_pending(chan); + return true; } static void rcar_i2c_irq_send(struct rcar_i2c_priv *priv, u32 msr) -- 2.11.0