From patchwork Wed Sep 9 04:10:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Song Bao Hua \(Barry Song\)" X-Patchwork-Id: 254749 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=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 032F4C43461 for ; Wed, 9 Sep 2020 04:13:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CB8F621D42 for ; Wed, 9 Sep 2020 04:13:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725821AbgIIENM (ORCPT ); Wed, 9 Sep 2020 00:13:12 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:11286 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725767AbgIIENL (ORCPT ); Wed, 9 Sep 2020 00:13:11 -0400 Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 861915EBC3146D599CB2; Wed, 9 Sep 2020 12:13:09 +0800 (CST) Received: from SWX921481.china.huawei.com (10.126.200.172) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.487.0; Wed, 9 Sep 2020 12:12:58 +0800 From: Barry Song To: , , CC: , Barry Song , "Gregory CLEMENT" , =?utf-8?q?Andreas_F=C3=A4rber?= , Manivannan Sadhasivam , Akash Asthana , Mukesh Savaliya , Andy Gross , Bjorn Andersson Subject: [PATCH] i2c: busses: replace spin_lock_irqsave by spin_lock in hard IRQ Date: Wed, 9 Sep 2020 16:10:01 +1200 Message-ID: <20200909041001.5612-1-song.bao.hua@hisilicon.com> X-Mailer: git-send-email 2.21.0.windows.1 MIME-Version: 1.0 X-Originating-IP: [10.126.200.172] X-CFilter-Loop: Reflected Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org The code has been in a irq-disabled context since it is hard IRQ. There is no necessity to do it again. Cc: Gregory CLEMENT Cc: "Andreas Färber" Cc: Manivannan Sadhasivam Cc: Akash Asthana Cc: Mukesh Savaliya Cc: Andy Gross Cc: Bjorn Andersson Signed-off-by: Barry Song Reviewed-by: Mukesh Kumar Savaliya --- drivers/i2c/busses/i2c-mv64xxx.c | 5 ++--- drivers/i2c/busses/i2c-owl.c | 5 ++--- drivers/i2c/busses/i2c-qcom-geni.c | 5 ++--- 3 files changed, 6 insertions(+), 9 deletions(-) diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c index 8d9d4ffdcd24..e0e45fc19b8f 100644 --- a/drivers/i2c/busses/i2c-mv64xxx.c +++ b/drivers/i2c/busses/i2c-mv64xxx.c @@ -496,11 +496,10 @@ static irqreturn_t mv64xxx_i2c_intr(int irq, void *dev_id) { struct mv64xxx_i2c_data *drv_data = dev_id; - unsigned long flags; u32 status; irqreturn_t rc = IRQ_NONE; - spin_lock_irqsave(&drv_data->lock, flags); + spin_lock(&drv_data->lock); if (drv_data->offload_enabled) rc = mv64xxx_i2c_intr_offload(drv_data); @@ -517,7 +516,7 @@ mv64xxx_i2c_intr(int irq, void *dev_id) rc = IRQ_HANDLED; } - spin_unlock_irqrestore(&drv_data->lock, flags); + spin_unlock(&drv_data->lock); return rc; } diff --git a/drivers/i2c/busses/i2c-owl.c b/drivers/i2c/busses/i2c-owl.c index 672f1f239bd6..618d3013d0b6 100644 --- a/drivers/i2c/busses/i2c-owl.c +++ b/drivers/i2c/busses/i2c-owl.c @@ -165,10 +165,9 @@ static irqreturn_t owl_i2c_interrupt(int irq, void *_dev) { struct owl_i2c_dev *i2c_dev = _dev; struct i2c_msg *msg = i2c_dev->msg; - unsigned long flags; unsigned int stat, fifostat; - spin_lock_irqsave(&i2c_dev->lock, flags); + spin_lock(&i2c_dev->lock); i2c_dev->err = 0; @@ -208,7 +207,7 @@ static irqreturn_t owl_i2c_interrupt(int irq, void *_dev) OWL_I2C_STAT_IRQP, true); complete_all(&i2c_dev->msg_complete); - spin_unlock_irqrestore(&i2c_dev->lock, flags); + spin_unlock(&i2c_dev->lock); return IRQ_HANDLED; } diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c index dead5db3315a..8b4c35f47a70 100644 --- a/drivers/i2c/busses/i2c-qcom-geni.c +++ b/drivers/i2c/busses/i2c-qcom-geni.c @@ -210,9 +210,8 @@ static irqreturn_t geni_i2c_irq(int irq, void *dev) u32 dma; u32 val; struct i2c_msg *cur; - unsigned long flags; - spin_lock_irqsave(&gi2c->lock, flags); + spin_lock(&gi2c->lock); m_stat = readl_relaxed(base + SE_GENI_M_IRQ_STATUS); rx_st = readl_relaxed(base + SE_GENI_RX_FIFO_STATUS); dm_tx_st = readl_relaxed(base + SE_DMA_TX_IRQ_STAT); @@ -294,7 +293,7 @@ static irqreturn_t geni_i2c_irq(int irq, void *dev) dm_rx_st & RX_DMA_DONE || dm_rx_st & RX_RESET_DONE) complete(&gi2c->done); - spin_unlock_irqrestore(&gi2c->lock, flags); + spin_unlock(&gi2c->lock); return IRQ_HANDLED; }