From patchwork Thu Feb 22 14:58:38 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marek_Beh=C3=BAn?= X-Patchwork-Id: 13567443 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 28E4814A08E; Thu, 22 Feb 2024 14:58:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708613936; cv=none; b=OuNK8su1+iCnC0xrcGF4PE4fdS9TneA0zXuFWC5ScZFasT+4VZfswB+0NR+tgbvENMUalsyDlgfiK24kg5jn/e1Q2zRAbIflKp5+nVtDRlYqHYKZNiBcYm8If+0muSoNwYQvUhkFW2h/1yeDJE304OMhP3XzWClT9ZfcxQGKrFw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708613936; c=relaxed/simple; bh=Z8WJfnfkr1TQrwC6yhBgJ/u6pMBgF8k+OzRE3qZWuCY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=kiccKPhmMf71s1+5SKYBKDhUK2qRd1Pg7wjmfXzgDp04UpFJwIk6q/MYW3ZPsVQbPCT/C/g4RGVvYmoXzpLZkib/z3yHuukaAIVUPT2WinVfESUXFOaDLO6jS/erK2Aw85DHwMqomkUv1jAgGiojY5HKmWSOEldw/vQO+8Y3RjU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=t9NoAKC8; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="t9NoAKC8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EA270C433A6; Thu, 22 Feb 2024 14:58:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1708613935; bh=Z8WJfnfkr1TQrwC6yhBgJ/u6pMBgF8k+OzRE3qZWuCY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=t9NoAKC8Vfx6RorHuMf0CWvfFOftnz+deOHPW1/9ECSRuLelTJLX2+RbpSGTA9coJ vZPFuQFr24eqcwzMSexKN3cRFGDqy6ls375KVr+UEui1aN006FsDHEfkbzHFOeKnJa SYuD2YuIwF27abngJz3ghjPKkxuiPcbzC/qCA8P915XtGEdZN1U7cDJglABsCGa6pm 4IJklWHXluNwUs58XJ3boZs0AliopsPDAeqIedXZ8/SPAP+U2bUqeSyt6i4JQQhK/h ecOxCO7wefrckmMiHsuF7F+bGE2SA2CDmW7x1ykSIBaLrhE/xDKPu9mJwwBgnxKzH1 G92UrlOBO3tmw== From: =?utf-8?q?Marek_Beh=C3=BAn?= To: linux-kernel@vger.kernel.org, Hans de Goede , Matti Vaittinen Cc: =?utf-8?q?Marek_Beh=C3=BAn?= , =?utf-8?q?Horia_Geant?= =?utf-8?q?=C4=83?= , Pankaj Gupta , Gaurav Jain , Herbert Xu , "David S. Miller" , Davidlohr Bueso , Jonathan Cameron , Dave Jiang , Alison Schofield , Vishal Verma , Ira Weiny , Dan Williams , Bamvor Jian Zhang , Linus Walleij , Bartosz Golaszewski , Douglas Anderson , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , James Seo , Jean Delvare , Guenter Roeck , linux-crypto@vger.kernel.org, linux-cxl@vger.kernel.org, linux-gpio@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-hwmon@vger.kernel.org Subject: [PATCH 2/2] devm-helpers: Add resource managed version of debugfs directory create function Date: Thu, 22 Feb 2024 15:58:38 +0100 Message-ID: <20240222145838.12916-2-kabel@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240222145838.12916-1-kabel@kernel.org> References: <20240222145838.12916-1-kabel@kernel.org> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 A few drivers register a devm action to remove a debugfs directory, implementing a one-liner function that calls debufs_remove_recursive(). Help drivers avoid this repeated implementations by adding managed version of debugfs directory create function. Use the new function devm_debugfs_create_dir() in the following drivers: drivers/crypto/caam/ctrl.c drivers/gpu/drm/bridge/ti-sn65dsi86.c drivers/hwmon/hp-wmi-sensors.c drivers/hwmon/mr75203.c drivers/hwmon/pmbus/pmbus_core.c Also use the action function devm_debugfs_dir_recursive_drop() in drivers drivers/cxl/mem.c drivers/gpio/gpio-mockup.c Signed-off-by: Marek Behún --- drivers/crypto/caam/ctrl.c | 16 +++------ drivers/cxl/mem.c | 9 ++--- drivers/gpio/gpio-mockup.c | 11 ++---- drivers/gpu/drm/bridge/ti-sn65dsi86.c | 13 ++------ drivers/hwmon/hp-wmi-sensors.c | 15 ++------- drivers/hwmon/mr75203.c | 15 +++------ drivers/hwmon/pmbus/pmbus_core.c | 16 +++------ include/linux/devm-helpers.h | 48 +++++++++++++++++++++++++++ 8 files changed, 72 insertions(+), 71 deletions(-) diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c index bdf367f3f679..ea3ed9a17f1a 100644 --- a/drivers/crypto/caam/ctrl.c +++ b/drivers/crypto/caam/ctrl.c @@ -7,6 +7,7 @@ */ #include +#include #include #include #include @@ -604,11 +605,6 @@ static int init_clocks(struct device *dev, const struct caam_imx_data *data) return devm_add_action_or_reset(dev, disable_clocks, ctrlpriv); } -static void caam_remove_debugfs(void *root) -{ - debugfs_remove_recursive(root); -} - #ifdef CONFIG_FSL_MC_BUS static bool check_version(struct fsl_mc_version *mc_version, u32 major, u32 minor, u32 revision) @@ -1058,13 +1054,9 @@ static int caam_probe(struct platform_device *pdev) ctrlpriv->era = caam_get_era(perfmon); ctrlpriv->domain = iommu_get_domain_for_dev(dev); - dfs_root = debugfs_create_dir(dev_name(dev), NULL); - if (IS_ENABLED(CONFIG_DEBUG_FS)) { - ret = devm_add_action_or_reset(dev, caam_remove_debugfs, - dfs_root); - if (ret) - return ret; - } + dfs_root = devm_debugfs_create_dir(dev, dev_name(dev), NULL); + if (IS_ERR(dfs_root)) + return PTR_ERR(dfs_root); caam_debugfs_init(ctrlpriv, perfmon, dfs_root); diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c index c5c9d8e0d88d..4b38514887a4 100644 --- a/drivers/cxl/mem.c +++ b/drivers/cxl/mem.c @@ -2,6 +2,7 @@ /* Copyright(c) 2022 Intel Corporation. All rights reserved. */ #include #include +#include #include #include @@ -30,11 +31,6 @@ static void enable_suspend(void *data) cxl_mem_active_dec(); } -static void remove_debugfs(void *dentry) -{ - debugfs_remove_recursive(dentry); -} - static int cxl_mem_dpa_show(struct seq_file *file, void *data) { struct device *dev = file->private; @@ -138,7 +134,8 @@ static int cxl_mem_probe(struct device *dev) debugfs_create_file("clear_poison", 0200, dentry, cxlmd, &cxl_poison_clear_fops); - rc = devm_add_action_or_reset(dev, remove_debugfs, dentry); + rc = devm_add_action_or_reset(dev, devm_debugfs_dir_recursive_drop, + dentry); if (rc) return rc; diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c index 455eecf6380e..adbe0fe09490 100644 --- a/drivers/gpio/gpio-mockup.c +++ b/drivers/gpio/gpio-mockup.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -390,13 +391,6 @@ static void gpio_mockup_debugfs_setup(struct device *dev, } } -static void gpio_mockup_debugfs_cleanup(void *data) -{ - struct gpio_mockup_chip *chip = data; - - debugfs_remove_recursive(chip->dbg_dir); -} - static void gpio_mockup_dispose_mappings(void *data) { struct gpio_mockup_chip *chip = data; @@ -480,7 +474,8 @@ static int gpio_mockup_probe(struct platform_device *pdev) gpio_mockup_debugfs_setup(dev, chip); - return devm_add_action_or_reset(dev, gpio_mockup_debugfs_cleanup, chip); + return devm_add_action_or_reset(dev, devm_debugfs_dir_recursive_drop, + chip->dbg_dir); } static const struct of_device_id gpio_mockup_of_match[] = { diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c index 62cc3893dca5..ad0ed2459394 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -427,18 +428,12 @@ static int status_show(struct seq_file *s, void *data) DEFINE_SHOW_ATTRIBUTE(status); -static void ti_sn65dsi86_debugfs_remove(void *data) -{ - debugfs_remove_recursive(data); -} - static void ti_sn65dsi86_debugfs_init(struct ti_sn65dsi86 *pdata) { struct device *dev = pdata->dev; struct dentry *debugfs; - int ret; - debugfs = debugfs_create_dir(dev_name(dev), NULL); + debugfs = devm_debugfs_create_dir(dev, dev_name(dev), NULL); /* * We might get an error back if debugfs wasn't enabled in the kernel @@ -447,10 +442,6 @@ static void ti_sn65dsi86_debugfs_init(struct ti_sn65dsi86 *pdata) if (IS_ERR_OR_NULL(debugfs)) return; - ret = devm_add_action_or_reset(dev, ti_sn65dsi86_debugfs_remove, debugfs); - if (ret) - return; - debugfs_create_file("status", 0600, debugfs, pdata, &status_fops); } diff --git a/drivers/hwmon/hp-wmi-sensors.c b/drivers/hwmon/hp-wmi-sensors.c index b5325d0e72b9..2a7c33763ce8 100644 --- a/drivers/hwmon/hp-wmi-sensors.c +++ b/drivers/hwmon/hp-wmi-sensors.c @@ -23,6 +23,7 @@ #include #include +#include #include #include #include @@ -1304,12 +1305,6 @@ static int current_reading_show(struct seq_file *seqf, void *ignored) } DEFINE_SHOW_ATTRIBUTE(current_reading); -/* hp_wmi_devm_debugfs_remove - devm callback for debugfs cleanup */ -static void hp_wmi_devm_debugfs_remove(void *res) -{ - debugfs_remove_recursive(res); -} - /* hp_wmi_debugfs_init - create and populate debugfs directory tree */ static void hp_wmi_debugfs_init(struct device *dev, struct hp_wmi_info *info, struct hp_wmi_platform_events *pevents, @@ -1320,21 +1315,15 @@ static void hp_wmi_debugfs_init(struct device *dev, struct hp_wmi_info *info, struct dentry *debugfs; struct dentry *entries; struct dentry *dir; - int err; u8 i; /* dev_name() gives a not-very-friendly GUID for WMI devices. */ scnprintf(buf, sizeof(buf), "hp-wmi-sensors-%u", dev->id); - debugfs = debugfs_create_dir(buf, NULL); + debugfs = devm_debugfs_create_dir(dev, buf, NULL); if (IS_ERR(debugfs)) return; - err = devm_add_action_or_reset(dev, hp_wmi_devm_debugfs_remove, - debugfs); - if (err) - return; - entries = debugfs_create_dir("sensor", debugfs); for (i = 0; i < icount; i++, info++) { diff --git a/drivers/hwmon/mr75203.c b/drivers/hwmon/mr75203.c index 50a8b9c3f94d..50f348fca108 100644 --- a/drivers/hwmon/mr75203.c +++ b/drivers/hwmon/mr75203.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -216,17 +217,11 @@ static const struct file_operations pvt_ts_coeff_j_fops = { .llseek = default_llseek, }; -static void devm_pvt_ts_dbgfs_remove(void *data) -{ - struct pvt_device *pvt = (struct pvt_device *)data; - - debugfs_remove_recursive(pvt->dbgfs_dir); - pvt->dbgfs_dir = NULL; -} - static int pvt_ts_dbgfs_create(struct pvt_device *pvt, struct device *dev) { - pvt->dbgfs_dir = debugfs_create_dir(dev_name(dev), NULL); + pvt->dbgfs_dir = devm_debugfs_create_dir(dev, dev_name(dev), NULL); + if (IS_ERR(pvt->dbgfs_dir)) + return PTR_ERR(pvt->dbgfs_dir); debugfs_create_u32("ts_coeff_h", 0644, pvt->dbgfs_dir, &pvt->ts_coeff.h); @@ -237,7 +232,7 @@ static int pvt_ts_dbgfs_create(struct pvt_device *pvt, struct device *dev) debugfs_create_file("ts_coeff_j", 0644, pvt->dbgfs_dir, pvt, &pvt_ts_coeff_j_fops); - return devm_add_action_or_reset(dev, devm_pvt_ts_dbgfs_remove, pvt); + return 0; } static umode_t pvt_is_visible(const void *data, enum hwmon_sensor_types type, diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index 1363d9f89181..e0f956a21125 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -7,6 +7,7 @@ */ #include +#include #include #include #include @@ -3336,13 +3337,6 @@ static const struct file_operations pmbus_debugfs_ops_mfr = { .open = simple_open, }; -static void pmbus_remove_debugfs(void *data) -{ - struct dentry *entry = data; - - debugfs_remove_recursive(entry); -} - static int pmbus_init_debugfs(struct i2c_client *client, struct pmbus_data *data) { @@ -3357,8 +3351,9 @@ static int pmbus_init_debugfs(struct i2c_client *client, * Create the debugfs directory for this device. Use the hwmon device * name to avoid conflicts (hwmon numbers are globally unique). */ - data->debugfs = debugfs_create_dir(dev_name(data->hwmon_dev), - pmbus_debugfs_dir); + data->debugfs = devm_debugfs_create_dir(data->dev, + dev_name(data->hwmon_dev), + pmbus_debugfs_dir); if (IS_ERR_OR_NULL(data->debugfs)) { data->debugfs = NULL; return -ENODEV; @@ -3542,8 +3537,7 @@ static int pmbus_init_debugfs(struct i2c_client *client, } } - return devm_add_action_or_reset(data->dev, - pmbus_remove_debugfs, data->debugfs); + return 0; } #else static int pmbus_init_debugfs(struct i2c_client *client, diff --git a/include/linux/devm-helpers.h b/include/linux/devm-helpers.h index 70640fb96117..39d743175ec4 100644 --- a/include/linux/devm-helpers.h +++ b/include/linux/devm-helpers.h @@ -23,6 +23,7 @@ * already ran. */ +#include #include #include #include @@ -108,4 +109,51 @@ static inline int devm_mutex_init(struct device *dev, struct mutex *lock) return 0; } +static inline void devm_debugfs_dir_recursive_drop(void *res) +{ + debugfs_remove_recursive(res); +} + +/** + * devm_debugfs_create_dir - Resource managed debugfs directory creation + * @dev: Device which lifetime the directory is bound to + * @name: a pointer to a string containing the name of the directory to + * create + * @parent: a pointer to the parent dentry for this file. This should be a + * directory dentry if set. If this parameter is NULL, then the + * directory will be created in the root of the debugfs filesystem. + * + * Create a debugfs directory which is automatically recursively removed when + * the driver is detached. A few drivers create debugfs directories which they + * want removed before driver is detached. + * devm_debugfs_create_dir() can be used to omit the explicit + * debugfs_remove_recursive() call when driver is detached. + */ +static inline struct dentry * +devm_debugfs_create_dir(struct device *dev, const char *name, + struct dentry *parent) +{ + struct dentry *dentry; + + dentry = debugfs_create_dir(name, parent); + if (IS_ERR(dentry)) + return dentry; + + /* + * debugfs_remove_recursive() is an empty function if CONFIG_DEBUG_FS is + * disabled. No need to register an action in that case. + */ + if (IS_ENABLED(CONFIG_DEBUG_FS)) { + int err; + + err = devm_add_action_or_reset(dev, + devm_debugfs_dir_recursive_drop, + dentry); + if (err < 0) + return ERR_PTR(err); + } + + return dentry; +} + #endif