From patchwork Thu Mar 30 21:03:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= X-Patchwork-Id: 13194860 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 164E3C77B60 for ; Thu, 30 Mar 2023 21:04:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229933AbjC3VEF (ORCPT ); Thu, 30 Mar 2023 17:04:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33632 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229924AbjC3VEC (ORCPT ); Thu, 30 Mar 2023 17:04:02 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3A7DBEB49 for ; Thu, 30 Mar 2023 14:04:01 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1phzQw-00028o-Oi; Thu, 30 Mar 2023 23:03:46 +0200 Received: from [2a0a:edc0:0:900:1d::77] (helo=ptz.office.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1phzQv-007qTS-0G; Thu, 30 Mar 2023 23:03:45 +0200 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1phzQt-009Hr9-KT; Thu, 30 Mar 2023 23:03:43 +0200 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: Andy Gross , Bjorn Andersson , Mark Brown Cc: Konrad Dybcio , linux-arm-msm@vger.kernel.org, linux-spi@vger.kernel.org, kernel@pengutronix.de Subject: [PATCH 1/2] spi: qup: Don't skip cleanup in remove's error path Date: Thu, 30 Mar 2023 23:03:40 +0200 Message-Id: <20230330210341.2459548-2-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230330210341.2459548-1-u.kleine-koenig@pengutronix.de> References: <20230330210341.2459548-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1666; i=u.kleine-koenig@pengutronix.de; h=from:subject; bh=6/vEy1Mo9ElX8APtQSvIdJqXun8Q9L13V7ppH8ExTZQ=; b=owEBbQGS/pANAwAKAY+A+1h9Ev5OAcsmYgBkJfkp2CelunJXQ6oDPGfyjkXW9I+7Twa5DCV2+ 5oBacxQ73qJATMEAAEKAB0WIQQ/gaxpOnoeWYmt/tOPgPtYfRL+TgUCZCX5KQAKCRCPgPtYfRL+ TiB9CACySh8cTwRzEmGCQZLaF1HziDmbSwUXoV2IdNAfXxuR4BwOh9xrUbwlMfn6Dxd9FqkV/N0 uowVHsD7Lk4djwS+G4ordUzfp2XFufhHJWZP7BLk3F3nrlnoEhFxrn9VfNgmG5cTJjNMlQvbF+C YVoF22SRC29f8HUpgLkFi4XaK0upOiKGkO/pIVbTASdF3uNvGu+9xghdsLcyonfuXiS0PuHPRVo xhLlvZQMu4iFC9Y3xncbZayfruCnUOYFbz8jfy4p5XogTDx8fLYBpNNcyrfQJVDKdNnmcdcNR/Q wAi4TtIu/I8oNlgKTsB5rx6Csb7ge+zXYksltiuY21/OlbIr X-Developer-Key: i=u.kleine-koenig@pengutronix.de; a=openpgp; fpr=0D2511F322BFAB1C1580266BE2DCDD9132669BD6 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-msm@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Returning early in a platform driver's remove callback is wrong. In this case the dma resources are not released in the error path. this is never retried later and so this is a permanent leak. To fix this, only skip hardware disabling if waking the device fails. Fixes: 64ff247a978f ("spi: Add Qualcomm QUP SPI controller support") Signed-off-by: Uwe Kleine-König --- drivers/spi/spi-qup.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index 678dc51ef017..205e54f157b4 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -1277,18 +1277,22 @@ static int spi_qup_remove(struct platform_device *pdev) struct spi_qup *controller = spi_master_get_devdata(master); int ret; - ret = pm_runtime_resume_and_get(&pdev->dev); - if (ret < 0) - return ret; + ret = pm_runtime_get_sync(&pdev->dev); - ret = spi_qup_set_state(controller, QUP_STATE_RESET); - if (ret) - return ret; + if (ret >= 0) { + ret = spi_qup_set_state(controller, QUP_STATE_RESET); + if (ret) + dev_warn(&pdev->dev, "failed to reset controller (%pe)\n", + ERR_PTR(ret)); - spi_qup_release_dma(master); + clk_disable_unprepare(controller->cclk); + clk_disable_unprepare(controller->iclk); + } else { + dev_warn(&pdev->dev, "failed to resume, skip hw disable (%pe)\n", + ERR_PTR(ret)); + } - clk_disable_unprepare(controller->cclk); - clk_disable_unprepare(controller->iclk); + spi_qup_release_dma(master); pm_runtime_put_noidle(&pdev->dev); pm_runtime_disable(&pdev->dev);