From patchwork Thu Aug 28 06:55:02 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 4799701 Return-Path: X-Original-To: patchwork-ltsi-dev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 2D0EEC0338 for ; Thu, 28 Aug 2014 08:38:57 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 266C620158 for ; Thu, 28 Aug 2014 08:38:56 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 45CB420145 for ; Thu, 28 Aug 2014 08:38:55 +0000 (UTC) Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id D881415B0; Thu, 28 Aug 2014 07:35:31 +0000 (UTC) X-Original-To: ltsi-dev@lists.linuxfoundation.org Delivered-To: ltsi-dev@mail.linuxfoundation.org Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 890F015F1 for ; Thu, 28 Aug 2014 07:34:52 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from kirsty.vergenet.net (kirsty.vergenet.net [202.4.237.240]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 087D52025A for ; Thu, 28 Aug 2014 07:34:52 +0000 (UTC) Received: from ayumi.isobedori.kobe.vergenet.net (p4222-ipbfp1605kobeminato.hyogo.ocn.ne.jp [114.154.95.222]) by kirsty.vergenet.net (Postfix) with ESMTP id C81F82671F7; Thu, 28 Aug 2014 17:07:52 +1000 (EST) Received: by ayumi.isobedori.kobe.vergenet.net (Postfix, from userid 7100) id 114E8EDE5F7; Thu, 28 Aug 2014 16:07:50 +0900 (JST) From: Simon Horman To: ltsi-dev@lists.linuxfoundation.org Date: Thu, 28 Aug 2014 15:55:02 +0900 Message-Id: <1409209620-24487-177-git-send-email-horms+renesas@verge.net.au> X-Mailer: git-send-email 2.0.1 In-Reply-To: <1409209620-24487-1-git-send-email-horms+renesas@verge.net.au> References: <1409209620-24487-1-git-send-email-horms+renesas@verge.net.au> X-Spam-Status: No, score=-4.2 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 Cc: Magnus Damm Subject: [LTSI-dev] [PATCH LTSI-3.14 176/894] i2c: rcar: remove spinlock X-BeenThere: ltsi-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "A list to discuss patches, development, and other things related to the LTSI project" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: ltsi-dev-bounces@lists.linuxfoundation.org Errors-To: ltsi-dev-bounces@lists.linuxfoundation.org X-Virus-Scanned: ClamAV using ClamSMTP From: Wolfram Sang The i2c core has per-adapter locks, so no need to protect again. Signed-off-by: Wolfram Sang Acked-by: Kuninori Morimoto Acked-by: Geert Uytterhoeven Signed-off-by: Wolfram Sang (cherry picked from commit 150b8be3cda54412ad7b54f5392b513b25c0aaa7) Signed-off-by: Simon Horman --- drivers/i2c/busses/i2c-rcar.c | 22 ---------------------- 1 file changed, 22 deletions(-) diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 07256a6..e167841 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -36,7 +36,6 @@ #include #include #include -#include /* register offsets */ #define ICSCR 0x00 /* slave ctrl */ @@ -110,7 +109,6 @@ struct rcar_i2c_priv { struct i2c_msg *msg; struct clk *clk; - spinlock_t lock; wait_queue_head_t wait; int pos; @@ -394,9 +392,6 @@ static irqreturn_t rcar_i2c_irq(int irq, void *ptr) struct device *dev = rcar_i2c_priv_to_dev(priv); u32 msr; - /*-------------- spin lock -----------------*/ - spin_lock(&priv->lock); - msr = rcar_i2c_read(priv, ICMSR); /* @@ -450,9 +445,6 @@ out: wake_up(&priv->wait); } - spin_unlock(&priv->lock); - /*-------------- spin unlock -----------------*/ - return IRQ_HANDLED; } @@ -462,21 +454,14 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap, { struct rcar_i2c_priv *priv = i2c_get_adapdata(adap); struct device *dev = rcar_i2c_priv_to_dev(priv); - unsigned long flags; int i, ret, timeout; pm_runtime_get_sync(dev); - /*-------------- spin lock -----------------*/ - spin_lock_irqsave(&priv->lock, flags); - rcar_i2c_init(priv); /* start clock */ rcar_i2c_write(priv, ICCCR, priv->icccr); - spin_unlock_irqrestore(&priv->lock, flags); - /*-------------- spin unlock -----------------*/ - ret = rcar_i2c_bus_barrier(priv); if (ret < 0) goto out; @@ -488,9 +473,6 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap, break; } - /*-------------- spin lock -----------------*/ - spin_lock_irqsave(&priv->lock, flags); - /* init each data */ priv->msg = &msgs[i]; priv->pos = 0; @@ -500,9 +482,6 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap, ret = rcar_i2c_prepare_msg(priv); - spin_unlock_irqrestore(&priv->lock, flags); - /*-------------- spin unlock -----------------*/ - if (ret < 0) break; @@ -614,7 +593,6 @@ static int rcar_i2c_probe(struct platform_device *pdev) irq = platform_get_irq(pdev, 0); init_waitqueue_head(&priv->wait); - spin_lock_init(&priv->lock); adap = &priv->adap; adap->nr = pdev->id;