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From: Armin Wolf <W_Armin@gmx.de>
To: "Rafael J. Wysocki" <rafael@kernel.org>,
	 Daniel Lezcano <daniel.lezcano@linaro.org>,
	Zhang Rui <rui.zhang@intel.com>,
	 Lukasz Luba <lukasz.luba@arm.com>, Len Brown <lenb@kernel.org>,
	 Jonathan Corbet <corbet@lwn.net>,
	Ido Schimmel <idosch@nvidia.com>,
	 Petr Machata <petrm@nvidia.com>
Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
	 etnaviv@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
	 linux-tegra@vger.kernel.org, linux-acpi@vger.kernel.org,
	 linux-doc@vger.kernel.org, netdev@vger.kernel.org,
	 linux-wireless@vger.kernel.org, ath10k@lists.infradead.org,
	 ath11k@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	 linux-mediatek@lists.infradead.org,
	platform-driver-x86@vger.kernel.org,  linux-pci@vger.kernel.org,
	imx@lists.linux.dev,  linux-renesas-soc@vger.kernel.org
Subject: [PATCH RFC RESEND 4/8] ACPI: fan: Stop creating "device" sysfs link
Date: Thu, 20 Nov 2025 04:41:14 +0100	[thread overview]
Message-ID: <20251120-thermal-device-v1-4-bbdad594d57a@gmx.de> (raw)
In-Reply-To: <20251120-thermal-device-v1-0-bbdad594d57a@gmx.de>

The thermal core will soon automatically create sysfs links between
the cooling device and its parent device. Stop manually creating
the "device" sysfs link between the cooling device and the parent
device to avoid a name collision. The "thermal_cooling" sysfs link
however stays for backwards compatibility, as it does not suffer
from a name collision.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
---
 drivers/acpi/fan_core.c | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/drivers/acpi/fan_core.c b/drivers/acpi/fan_core.c
index fb08b8549ed7..2ca3e347f15c 100644
--- a/drivers/acpi/fan_core.c
+++ b/drivers/acpi/fan_core.c
@@ -594,6 +594,7 @@ static int acpi_fan_probe(struct platform_device *pdev)
 	dev_dbg(&pdev->dev, "registered as cooling_device%d\n", cdev->id);
 
 	fan->cdev = cdev;
+	/* For backwards compatibility */
 	result = sysfs_create_link(&pdev->dev.kobj,
 				   &cdev->device.kobj,
 				   "thermal_cooling");
@@ -602,18 +603,8 @@ static int acpi_fan_probe(struct platform_device *pdev)
 		goto err_unregister;
 	}
 
-	result = sysfs_create_link(&cdev->device.kobj,
-				   &pdev->dev.kobj,
-				   "device");
-	if (result) {
-		dev_err(&pdev->dev, "Failed to create sysfs link 'device'\n");
-		goto err_remove_link;
-	}
-
 	return 0;
 
-err_remove_link:
-	sysfs_remove_link(&pdev->dev.kobj, "thermal_cooling");
 err_unregister:
 	thermal_cooling_device_unregister(cdev);
 err_end:
@@ -633,7 +624,6 @@ static void acpi_fan_remove(struct platform_device *pdev)
 		acpi_fan_delete_attributes(device);
 	}
 	sysfs_remove_link(&pdev->dev.kobj, "thermal_cooling");
-	sysfs_remove_link(&fan->cdev->device.kobj, "device");
 	thermal_cooling_device_unregister(fan->cdev);
 }
 

-- 
2.39.5


  parent reply	other threads:[~2025-11-20  3:41 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-11-20  3:41 [PATCH RFC RESEND 0/8] thermal: core: Allow setting the parent device of thermal zone/cooling devices Armin Wolf
2025-11-20  3:41 ` [PATCH RFC RESEND 1/8] thermal: core: Allow setting the parent device of cooling devices Armin Wolf
2025-11-20  3:41 ` [PATCH RFC RESEND 2/8] thermal: core: Set parent device in thermal_of_cooling_device_register() Armin Wolf
2025-11-20  3:41 ` [PATCH RFC RESEND 3/8] ACPI: processor: Stop creating "device" sysfs link Armin Wolf
2025-11-20  3:41 ` Armin Wolf [this message]
2025-11-20  3:41 ` [PATCH RFC RESEND 5/8] ACPI: video: " Armin Wolf
2025-11-20  3:41 ` [PATCH RFC RESEND 6/8] thermal: core: Set parent device in thermal_cooling_device_register() Armin Wolf
2025-11-20  3:41 ` [PATCH RFC RESEND 7/8] ACPI: thermal: Stop creating "device" sysfs link Armin Wolf
2025-11-20  3:41 ` [PATCH RFC RESEND 8/8] thermal: core: Allow setting the parent device of thermal zone devices Armin Wolf
2025-11-21 20:35 ` [PATCH RFC RESEND 0/8] thermal: core: Allow setting the parent device of thermal zone/cooling devices Rafael J. Wysocki
2025-11-22 14:18   ` Armin Wolf
2025-11-27 17:41     ` Rafael J. Wysocki
2025-11-27 20:06       ` Armin Wolf
2025-11-27 21:46         ` Rafael J. Wysocki
2025-11-27 23:49           ` Armin Wolf
2025-11-28 11:40             ` Rafael J. Wysocki
2025-11-29 11:35               ` Armin Wolf
2025-11-30 12:55                 ` Rafael J. Wysocki
2025-11-27 18:22     ` Rafael J. Wysocki
2025-11-27 20:29       ` Armin Wolf
2025-11-27 22:14         ` Rafael J. Wysocki
2025-11-27 23:52           ` Armin Wolf

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