From patchwork Wed May 12 14:45:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 438579 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 762DEC43461 for ; Wed, 12 May 2021 15:30:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3FD7261C27 for ; Wed, 12 May 2021 15:30:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233758AbhELPb3 (ORCPT ); Wed, 12 May 2021 11:31:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:40900 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235299AbhELP1a (ORCPT ); Wed, 12 May 2021 11:27:30 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2995B61AC0; Wed, 12 May 2021 15:12:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620832344; bh=bME7cUGweBvzQ7c7y/JPK8QS7iBPZOIG/OEuLVjhu40=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DCUKfqwyIHNcXzoO/HdXNxB0pSTHpOS5Onh8YzN64+GwRcO+fcVV5FUsUkPOOzQjF wCPusjHIhxQWFeCs5dfujr1J74WslT4iZLc2dWm7ETMEwnZt2OKTavrpgAd+26WbFj 6xUM7ghtczmi/iVYNOcAkPNse+nx7ZGeAmWkjEJo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hulk Robot , Wang Li , Mark Brown , Sasha Levin Subject: [PATCH 5.10 241/530] spi: fsl-lpspi: Fix PM reference leak in lpspi_prepare_xfer_hardware() Date: Wed, 12 May 2021 16:45:51 +0200 Message-Id: <20210512144827.761097770@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144819.664462530@linuxfoundation.org> References: <20210512144819.664462530@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Wang Li [ Upstream commit a03675497970a93fcf25d81d9d92a59c2d7377a7 ] pm_runtime_get_sync will increment pm usage counter even it failed. Forgetting to putting operation will result in reference leak here. Fix it by replacing it with pm_runtime_resume_and_get to keep usage counter balanced. Fixes: 944c01a889d9 ("spi: lpspi: enable runtime pm for lpspi") Reported-by: Hulk Robot Signed-off-by: Wang Li Link: https://lore.kernel.org/r/20210409095430.29868-1-wangli74@huawei.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-fsl-lpspi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index a2886ee44e4c..5d98611dd999 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -200,7 +200,7 @@ static int lpspi_prepare_xfer_hardware(struct spi_controller *controller) spi_controller_get_devdata(controller); int ret; - ret = pm_runtime_get_sync(fsl_lpspi->dev); + ret = pm_runtime_resume_and_get(fsl_lpspi->dev); if (ret < 0) { dev_err(fsl_lpspi->dev, "failed to enable clock\n"); return ret;