From patchwork Tue Jul 9 20:37:26 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Patchwork-Id: 811474 Received: from todd.t-8ch.de (todd.t-8ch.de [159.69.126.157]) (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 8007F15216C; Tue, 9 Jul 2024 20:38:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.69.126.157 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720557504; cv=none; b=jNjePHC0Db3PH00N3UyA6aY5BSKQNVefXhGgY9shSzVWvcbcXoLRxSUMPHTHSyXrNhOwGCbX/1MIg5cOSO4mxHS5Ap9UcZW62oXUvwElLOEEJcdUPTxMQaYY1KDGJRvJpd4JSXRkyh0H4GNBcU3Q8bsu5A1LgsdgDAm80i04ELQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720557504; c=relaxed/simple; bh=wyLNNonp+7EAIRxVIHE6cr9kx2sg/BjXOWQjvwkKSCM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=O3E2VXyL2P1zDJ6kM75Iz9rI4hPO8Uk1yrQ/SkyyjFBvIODfwv6AYz4kTHdtZFN/S2n/cgSIUZqkzBtxMtp+DT5u4oNY1tm6ImI0WUDzXkHE0Aaqh3DVFYl/IJ6akQApoj9sTO2oVLjIZxzmqEUtSTxIFmXYR5yh8U91T2gubsM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net; spf=pass smtp.mailfrom=weissschuh.net; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b=iMpczcb/; arc=none smtp.client-ip=159.69.126.157 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b="iMpczcb/" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1720557499; bh=wyLNNonp+7EAIRxVIHE6cr9kx2sg/BjXOWQjvwkKSCM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=iMpczcb/9M3jdlnikdvV5lUhKrdmEjceGz9oSduRI0vGQFccMLfCENkfPiDuFI1Z4 HoQHMT2xpUHs/RYWkP3T19NKrwlxBqoMLmCyK8nlPCNu/56EplV5bN/AHG22RSuneq OAciqts4ElioDTGq3Hhpa/ZPuV9Ne/YOUbix74kI= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Date: Tue, 09 Jul 2024 22:37:26 +0200 Subject: [PATCH v2 3/5] ACPI: sysfs: manage attributes as attribute_group Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240709-acpi-sysfs-groups-v2-3-058ab0667fa8@weissschuh.net> References: <20240709-acpi-sysfs-groups-v2-0-058ab0667fa8@weissschuh.net> In-Reply-To: <20240709-acpi-sysfs-groups-v2-0-058ab0667fa8@weissschuh.net> To: "Rafael J. Wysocki" , Len Brown , Robert Moore , Lance Ortiz Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, acpica-devel@lists.linux.dev, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1720557498; l=6564; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=wyLNNonp+7EAIRxVIHE6cr9kx2sg/BjXOWQjvwkKSCM=; b=FRzNK3aA6OUYBjF/kHmDwML61eKtIbMW2Ak1zSYSPnRsnbazRKNaQ+fwFMw9p08hmbOi7BV4e 9GkfrVmIUn6ChJ/2mvbB2wurFRUbePl6/foP/kNyoURyQF2YpbPJhKw X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=KcycQgFPX2wGR5azS7RhpBqedglOZVgRPfdFSPB1LNw= The current manual attribute management is inconsistent and brittle. Not all return values of device_create_file() are checked and the cleanup logic needs to be kept up to date manually. Moving all attributes into an attribute_group and using the is_visible() callback allows the management of all attributes as a single unit. Signed-off-by: Thomas Weißschuh --- drivers/acpi/device_sysfs.c | 167 +++++++++++++++++++------------------------- 1 file changed, 71 insertions(+), 96 deletions(-) diff --git a/drivers/acpi/device_sysfs.c b/drivers/acpi/device_sysfs.c index 6e4858ea035f..4afc773383ad 100644 --- a/drivers/acpi/device_sysfs.c +++ b/drivers/acpi/device_sysfs.c @@ -517,88 +517,97 @@ static ssize_t status_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_RO(status); -/** - * acpi_device_setup_files - Create sysfs attributes of an ACPI device. - * @dev: ACPI device object. - */ -int acpi_device_setup_files(struct acpi_device *dev) -{ - int result = 0; +static struct attribute *acpi_attrs[] = { + &dev_attr_path.attr, + &dev_attr_hid.attr, + &dev_attr_modalias.attr, + &dev_attr_description.attr, + &dev_attr_adr.attr, + &dev_attr_uid.attr, + &dev_attr_sun.attr, + &dev_attr_hrv.attr, + &dev_attr_status.attr, + &dev_attr_eject.attr, + &dev_attr_power_state.attr, + &dev_attr_real_power_state.attr, + NULL +}; +static bool acpi_show_attr(struct acpi_device *dev, const struct device_attribute *attr) +{ /* * Devices gotten from FADT don't have a "path" attribute */ - if (dev->handle) { - result = device_create_file(&dev->dev, &dev_attr_path); - if (result) - goto end; - } + if (attr == &dev_attr_path) + return dev->handle; - if (!list_empty(&dev->pnp.ids)) { - result = device_create_file(&dev->dev, &dev_attr_hid); - if (result) - goto end; + if (attr == &dev_attr_hid || attr == &dev_attr_modalias) + return !list_empty(&dev->pnp.ids); - result = device_create_file(&dev->dev, &dev_attr_modalias); - if (result) - goto end; - } + if (attr == &dev_attr_description) + return acpi_has_method(dev->handle, "_STR"); - /* - * If device has _STR, 'description' file is created - */ - if (acpi_has_method(dev->handle, "_STR")) { - result = device_create_file(&dev->dev, &dev_attr_description); - if (result) - goto end; - } + if (attr == &dev_attr_adr) + return dev->pnp.type.bus_address; - if (dev->pnp.type.bus_address) - result = device_create_file(&dev->dev, &dev_attr_adr); - if (acpi_device_uid(dev)) - result = device_create_file(&dev->dev, &dev_attr_uid); + if (attr == &dev_attr_uid) + return acpi_device_uid(dev); - if (acpi_has_method(dev->handle, "_SUN")) { - result = device_create_file(&dev->dev, &dev_attr_sun); - if (result) - goto end; - } + if (attr == &dev_attr_sun) + return acpi_has_method(dev->handle, "_SUN"); - if (acpi_has_method(dev->handle, "_HRV")) { - result = device_create_file(&dev->dev, &dev_attr_hrv); - if (result) - goto end; - } + if (attr == &dev_attr_hrv) + return acpi_has_method(dev->handle, "_HRV"); - if (acpi_has_method(dev->handle, "_STA")) { - result = device_create_file(&dev->dev, &dev_attr_status); - if (result) - goto end; - } + if (attr == &dev_attr_status) + return acpi_has_method(dev->handle, "_STA"); /* * If device has _EJ0, 'eject' file is created that is used to trigger * hot-removal function from userland. */ - if (acpi_has_method(dev->handle, "_EJ0")) { - result = device_create_file(&dev->dev, &dev_attr_eject); - if (result) - return result; - } + if (attr == &dev_attr_eject) + return acpi_has_method(dev->handle, "_EJ0"); - if (dev->flags.power_manageable) { - result = device_create_file(&dev->dev, &dev_attr_power_state); - if (result) - return result; + if (attr == &dev_attr_power_state) + return dev->flags.power_manageable; - if (dev->power.flags.power_resources) - result = device_create_file(&dev->dev, - &dev_attr_real_power_state); - } + if (attr == &dev_attr_real_power_state) + return dev->flags.power_manageable && dev->power.flags.power_resources; + + dev_warn_once(&dev->dev, "Unexpected attribute: %s\n", attr->attr.name); + return false; +} + +static umode_t acpi_attr_is_visible(struct kobject *kobj, + struct attribute *attr, + int attrno) +{ + struct acpi_device *dev = to_acpi_device(kobj_to_dev(kobj)); + + if (acpi_show_attr(dev, container_of(attr, struct device_attribute, attr))) + return attr->mode; + else + return 0; +} + +static const struct attribute_group acpi_group = { + .attrs = acpi_attrs, + .is_visible = acpi_attr_is_visible, +}; + +/** + * acpi_device_setup_files - Create sysfs attributes of an ACPI device. + * @dev: ACPI device object. + */ +int acpi_device_setup_files(struct acpi_device *dev) +{ + int result = 0; + + result = device_add_group(&dev->dev, &acpi_group); acpi_expose_nondev_subnodes(&dev->dev.kobj, &dev->data); -end: return result; } @@ -609,39 +618,5 @@ int acpi_device_setup_files(struct acpi_device *dev) void acpi_device_remove_files(struct acpi_device *dev) { acpi_hide_nondev_subnodes(&dev->data); - - if (dev->flags.power_manageable) { - device_remove_file(&dev->dev, &dev_attr_power_state); - if (dev->power.flags.power_resources) - device_remove_file(&dev->dev, - &dev_attr_real_power_state); - } - - /* - * If device has _STR, remove 'description' file - */ - if (acpi_has_method(dev->handle, "_STR")) - device_remove_file(&dev->dev, &dev_attr_description); - /* - * If device has _EJ0, remove 'eject' file. - */ - if (acpi_has_method(dev->handle, "_EJ0")) - device_remove_file(&dev->dev, &dev_attr_eject); - - if (acpi_has_method(dev->handle, "_SUN")) - device_remove_file(&dev->dev, &dev_attr_sun); - - if (acpi_has_method(dev->handle, "_HRV")) - device_remove_file(&dev->dev, &dev_attr_hrv); - - if (acpi_device_uid(dev)) - device_remove_file(&dev->dev, &dev_attr_uid); - if (dev->pnp.type.bus_address) - device_remove_file(&dev->dev, &dev_attr_adr); - device_remove_file(&dev->dev, &dev_attr_modalias); - device_remove_file(&dev->dev, &dev_attr_hid); - if (acpi_has_method(dev->handle, "_STA")) - device_remove_file(&dev->dev, &dev_attr_status); - if (dev->handle) - device_remove_file(&dev->dev, &dev_attr_path); + device_remove_group(&dev->dev, &acpi_group); }