| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.9 207/252] ACPI: fan: Initialize performance state sysfs attribute | Date | Mon, 23 Nov 2020 13:22:37 +0100 |
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From: Guenter Roeck <linux@roeck-us.net>
commit 7dc7a8b04f3da8aa3c3be514e155e2fa094e976f upstream.
The following warning is reported if lock debugging is enabled.
DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 1 PID: 1 at kernel/locking/lockdep.c:4617 lockdep_init_map_waits+0x141/0x222 ... Call Trace: __kernfs_create_file+0x7a/0xd8 sysfs_add_file_mode_ns+0x135/0x189 sysfs_create_file_ns+0x70/0xa0 acpi_fan_probe+0x547/0x621 platform_drv_probe+0x67/0x8b ...
Dynamically allocated sysfs attributes need to be initialized to avoid the warning.
Fixes: d19e470b6605 ("ACPI: fan: Expose fan performance state information") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: 5.6+ <stable@vger.kernel.org> # 5.6+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/acpi/fan.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/acpi/fan.c +++ b/drivers/acpi/fan.c @@ -351,6 +351,7 @@ static int acpi_fan_get_fps(struct acpi_ struct acpi_fan_fps *fps = &fan->fps[i]; snprintf(fps->name, ACPI_FPS_NAME_LEN, "state%d", i); + sysfs_attr_init(&fps->dev_attr.attr); fps->dev_attr.show = show_state; fps->dev_attr.store = NULL; fps->dev_attr.attr.name = fps->name;
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