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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 62CAEC433E1 for ; Thu, 21 May 2020 07:09:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 420D220849 for ; Thu, 21 May 2020 07:09:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728316AbgEUHJD (ORCPT ); Thu, 21 May 2020 03:09:03 -0400 Received: from spam.zju.edu.cn ([61.164.42.155]:39276 "EHLO zju.edu.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727003AbgEUHJD (ORCPT ); Thu, 21 May 2020 03:09:03 -0400 Received: from localhost.localdomain (unknown [222.205.77.158]) by mail-app3 (Coremail) with SMTP id cC_KCgB3P7UAKcZe4sHmAA--.4260S4; Thu, 21 May 2020 15:08:52 +0800 (CST) From: Dinghao Liu To: dinghao.liu@zju.edu.cn, kjlu@umn.edu Cc: Pierre-Yves MORDRET , Maxime Coquelin , Alexandre Torgue , linux-i2c@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] i2c: stm32f7: Fix runtime PM imbalance in stm32f7_i2c_unreg_slave Date: Thu, 21 May 2020 15:08:47 +0800 Message-Id: <20200521070847.13957-1-dinghao.liu@zju.edu.cn> X-Mailer: git-send-email 2.17.1 X-CM-TRANSID: cC_KCgB3P7UAKcZe4sHmAA--.4260S4 X-Coremail-Antispam: 1UD129KBjvdXoWrKrWrZF15CFyUGr4xXF1UKFg_yoWfArc_Gr 1ku3ZrCw1vgFZ5J34UGF98ZryS9r98W348Zw40yFySk34Fvw1DGrWUZr93Cr47XrsrKr12 k3WDWF1fArsrCjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbxAFc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wAFIxvE14AK wVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK021l84ACjcxK6xIIjxv20x vE14v26w1j6s0DM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26rxl6s0DM28EF7xvwVC2z280 aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0DM2AIxVAIcxkEcVAq07 x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1Y6r17 McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr4 1lF7I21c0EjII2zVCS5cI20VAGYxC7MxkIecxEwVAFwVW8CwCF04k20xvY0x0EwIxGrwCF 04k20xvE74AGY7Cv6cx26r4fKr1UJr1l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4 xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43 MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I 0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVW3JVWrJr1lIxAIcVC2z280aVAFwI0_ Gr0_Cr1lIxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZFpf9x0J U67KsUUUUU= X-CM-SenderInfo: qrrzjiaqtzq6lmxovvfxof0/1tbiAgEHBlZdtOPItAACsg Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org pm_runtime_get_sync() increments the runtime PM usage counter even the call returns an error code. Thus a pairing decrement is needed on the error handling path to keep the counter balanced. Signed-off-by: Dinghao Liu --- drivers/i2c/busses/i2c-stm32f7.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c index 330ffed011e0..6f5f0fa68385 100644 --- a/drivers/i2c/busses/i2c-stm32f7.c +++ b/drivers/i2c/busses/i2c-stm32f7.c @@ -1837,8 +1837,10 @@ static int stm32f7_i2c_unreg_slave(struct i2c_client *slave) WARN_ON(!i2c_dev->slave[id]); ret = pm_runtime_get_sync(i2c_dev->dev); - if (ret < 0) + if (ret < 0) { + pm_runtime_put_autosuspend(i2c_dev->dev); return ret; + } if (id == 0) { mask = STM32F7_I2C_OAR1_OA1EN; -- 2.17.1