From patchwork Mon Dec 27 09:45:23 2021 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: 12699661 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 DD9DFC433FE for ; Mon, 27 Dec 2021 09:46:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236051AbhL0Jqc (ORCPT ); Mon, 27 Dec 2021 04:46:32 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43350 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235870AbhL0Jpx (ORCPT ); Mon, 27 Dec 2021 04:45:53 -0500 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 F01B9C06173E for ; Mon, 27 Dec 2021 01:45:52 -0800 (PST) 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 1n1mZY-0006an-62; Mon, 27 Dec 2021 10:45:40 +0100 Received: from [2a0a:edc0:0:900:1d::77] (helo=ptz.office.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1n1mZV-006u9a-Vg; Mon, 27 Dec 2021 10:45:37 +0100 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1n1mZU-0005XP-9E; Mon, 27 Dec 2021 10:45:36 +0100 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: William Breathitt Gray Cc: Lars-Peter Clausen , kernel@pengutronix.de, Jonathan Cameron , linux-iio@vger.kernel.org, Greg Kroah-Hartman , linux-kernel@vger.kernel.org, Fabrice Gasnier , Maxime Coquelin , Alexandre Torgue , Benjamin Gaignard , linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 20/23] counter: stm32-timer-cnt: Convert to new counter registration Date: Mon, 27 Dec 2021 10:45:23 +0100 Message-Id: <20211227094526.698714-21-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211227094526.698714-1-u.kleine-koenig@pengutronix.de> References: <20211227094526.698714-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-Patch-Hashes: v=1; h=sha256; i=v4zGYhOHsyg9iYZhNI1UDYcjthPJ6td3ckU3nWtgO68=; m=2JnEkPCaowZOKuyzD9yTFMIdrv+hKJ42Y0wCXUyIor0=; p=dDV9QrmT4JqkzSSSjNjq6wOVUXb8Sd9mQHeOzq19VTY=; g=6e4c634470f6219b318c73337ce4f94afb61474d X-Patch-Sig: m=pgp; i=u.kleine-koenig@pengutronix.de; s=0x0D2511F322BFAB1C1580266BE2DCDD9132669BD6; b=iQEzBAABCgAdFiEEfnIqFpAYrP8+dKQLwfwUeK3K7AkFAmHJir8ACgkQwfwUeK3K7Am01wgAny0 RSCdChCLcVQsdj67F6kIt9faenJUtWOG0prabyvryfhBLoBDrDw6kOZM1u24Q3sxb/XZPnmxnPjGh 8PTA25ECgi4dcRI4u1I++qrFugSuRF9Irio2ojmDBm/42gtfHTsSIR34YzFbkIw+An6jbFX/oaHwO 0w/+KMD56ND4QEroU74X7t5RAXM6ZGdoh+UoQRnF5uGYQMCd8djxZSVm+/uEkdLJbCkOR8BAHHHMg aBtK37YfIgjzGx3eIHlf/uWbSUeiixIqgQqBSTJiOv5macevzQ2RVGQP91Vexnc7LRAzWXrk+FqZF FgUqt8jRs1axIcbBS7GdHUf+bcFdL7g== 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-iio@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org This fixes device lifetime issues where it was possible to free a live struct device. Fixes: ad29937e206f ("counter: Add STM32 Timer quadrature encoder") Signed-off-by: Uwe Kleine-König Reviewed-by: Jonathan Cameron Acked-by: William Breathitt Gray --- drivers/counter/stm32-timer-cnt.c | 30 ++++++++++++++++++------------ 1 file changed, 18 insertions(+), 12 deletions(-) diff --git a/drivers/counter/stm32-timer-cnt.c b/drivers/counter/stm32-timer-cnt.c index 4b05b198a8d8..5779ae7c73cf 100644 --- a/drivers/counter/stm32-timer-cnt.c +++ b/drivers/counter/stm32-timer-cnt.c @@ -29,7 +29,6 @@ struct stm32_timer_regs { }; struct stm32_timer_cnt { - struct counter_device counter; struct regmap *regmap; struct clk *clk; u32 max_arr; @@ -317,31 +316,38 @@ static int stm32_timer_cnt_probe(struct platform_device *pdev) struct stm32_timers *ddata = dev_get_drvdata(pdev->dev.parent); struct device *dev = &pdev->dev; struct stm32_timer_cnt *priv; + struct counter_device *counter; + int ret; if (IS_ERR_OR_NULL(ddata)) return -EINVAL; - priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); - if (!priv) + counter = devm_counter_alloc(dev, sizeof(*priv)); + if (!counter) return -ENOMEM; + priv = counter_priv(counter); + priv->regmap = ddata->regmap; priv->clk = ddata->clk; priv->max_arr = ddata->max_arr; - priv->counter.name = dev_name(dev); - priv->counter.parent = dev; - priv->counter.ops = &stm32_timer_cnt_ops; - priv->counter.counts = &stm32_counts; - priv->counter.num_counts = 1; - priv->counter.signals = stm32_signals; - priv->counter.num_signals = ARRAY_SIZE(stm32_signals); - priv->counter.priv = priv; + counter->name = dev_name(dev); + counter->parent = dev; + counter->ops = &stm32_timer_cnt_ops; + counter->counts = &stm32_counts; + counter->num_counts = 1; + counter->signals = stm32_signals; + counter->num_signals = ARRAY_SIZE(stm32_signals); platform_set_drvdata(pdev, priv); /* Register Counter device */ - return devm_counter_register(dev, &priv->counter); + ret = devm_counter_add(dev, counter); + if (ret < 0) + dev_err_probe(dev, ret, "Failed to add counter\n"); + + return ret; } static int __maybe_unused stm32_timer_cnt_suspend(struct device *dev)