From patchwork Mon Apr 12 07:31:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dinghao Liu X-Patchwork-Id: 419788 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, 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 39D7FC433ED for ; Mon, 12 Apr 2021 07:34:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF2A06120B for ; Mon, 12 Apr 2021 07:34:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236808AbhDLHeA (ORCPT ); Mon, 12 Apr 2021 03:34:00 -0400 Received: from mail.zju.edu.cn ([61.164.42.155]:6606 "EHLO zju.edu.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S236898AbhDLHd7 (ORCPT ); Mon, 12 Apr 2021 03:33:59 -0400 Received: from localhost.localdomain (unknown [10.192.139.175]) by mail-app3 (Coremail) with SMTP id cC_KCgD34Dxq93Ng3rYJAQ--.16326S4; Mon, 12 Apr 2021 15:32:00 +0800 (CST) From: Dinghao Liu To: dinghao.liu@zju.edu.cn, kjlu@umn.edu Cc: Mark Brown , Michal Simek , linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] [v2] spi: spi-zynqmp-gqspi: Fix runtime PM imbalance in zynqmp_qspi_probe Date: Mon, 12 Apr 2021 15:31:54 +0800 Message-Id: <20210412073154.25011-1-dinghao.liu@zju.edu.cn> X-Mailer: git-send-email 2.17.1 X-CM-TRANSID: cC_KCgD34Dxq93Ng3rYJAQ--.16326S4 X-Coremail-Antispam: 1UD129KBjvJXoW7uFyfKw4kGryxtFykKFy5XFb_yoW8Gw1xpr 4vqFW7Kr40q3yftF1jk3y0qFy3XFyF93yxJrWkt3WFv3saqa4rtF1xJFyftFZ7AF97AFWj gF48C3yS9as8ZFJanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUkS1xkIjI8I6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AE w4v_Jr0_Jr4l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2 IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW0oVCq3wA2z4x0Y4vEx4A2 jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAS0I0E0xvYzxvE52 x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUGVWU XwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI4 8JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwCF04k20xvY0x0EwIxGrwCF04k20xvE74AGY7Cv 6cx26r4fKr1UJr1l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGw C20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAKI48J MIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMI IF0xvE42xK8VAvwI8IcIk0rVWrJr0_WFyUJwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY 6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjfUF9a9DUUUU X-CM-SenderInfo: qrrzjiaqtzq6lmxovvfxof0/1tbiAgcNBlZdtTWazAAIsb Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org There is a PM usage counter decrement after zynqmp_qspi_init_hw() without any refcount increment, which leads to refcount leak.Add a refcount increment to balance the refcount. Also set auto_runtime_pm to resume suspended spi controller. Signed-off-by: Dinghao Liu --- changelog: v2: - Add a refcount increment to fix refcout leak instead of the refcount decrement on error. Set ctlr->auto_runtime_pm = true. --- drivers/spi/spi-zynqmp-gqspi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/spi-zynqmp-gqspi.c b/drivers/spi/spi-zynqmp-gqspi.c index c8fa6ee18ae7..8b21c7b0e7eb 100644 --- a/drivers/spi/spi-zynqmp-gqspi.c +++ b/drivers/spi/spi-zynqmp-gqspi.c @@ -1160,6 +1160,7 @@ static int zynqmp_qspi_probe(struct platform_device *pdev) pm_runtime_set_autosuspend_delay(&pdev->dev, SPI_AUTOSUSPEND_TIMEOUT); pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); /* QSPI controller initializations */ zynqmp_qspi_init_hw(xqspi); @@ -1187,6 +1188,7 @@ static int zynqmp_qspi_probe(struct platform_device *pdev) ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_RX_DUAL | SPI_RX_QUAD | SPI_TX_DUAL | SPI_TX_QUAD; ctlr->dev.of_node = np; + ctlr->auto_runtime_pm = true; ret = devm_spi_register_controller(&pdev->dev, ctlr); if (ret) {