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During the rework of the fan behavior control code in commitd8e8362b09("platform/x86: acer-wmi: Fix setting of fan behavior"), acer_toggle_turbo() was changed to use WMID_gaming_set_fan_behavior() instead of WMID_gaming_set_u64() when switching the fans to turbo mode. The new function however does not check if the necessary capability (ACER_CAP_TURBO_FAN) is actually enabled on a given machine, causing the driver to potentially access unsupported features. Fix this by manually checking if ACER_CAP_TURBO_FAN is enabled on a given machine before changing the fan mode. Cc: stable@vger.kernel.org Fixes:d8e8362b09("platform/x86: acer-wmi: Fix setting of fan behavior") Signed-off-by: Armin Wolf <W_Armin@gmx.de> Link: https://patch.msgid.link/20260108164716.14376-2-W_Armin@gmx.de Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>