From: Aaron Ma Date: Fri, 3 Apr 2020 14:34:19 +0000 (+0800) Subject: drm/amdgpu: Fix oops when pp_funcs is unset in ACPI event X-Git-Tag: v5.15~4028^2~1^2~24 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5932d260a8d85a103bd6c504fbb85ff58b156bf9;p=platform%2Fkernel%2Flinux-starfive.git drm/amdgpu: Fix oops when pp_funcs is unset in ACPI event On ARCTURUS and RENOIR, powerplay is not supported yet. When plug in or unplug power jack, ACPI event will issue. Then kernel NULL pointer BUG will be triggered. Check for NULL pointers before calling. Signed-off-by: Aaron Ma Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c index f197f1b..abe94a5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c @@ -89,7 +89,8 @@ void amdgpu_pm_acpi_event_handler(struct amdgpu_device *adev) adev->pm.ac_power = true; else adev->pm.ac_power = false; - if (adev->powerplay.pp_funcs->enable_bapm) + if (adev->powerplay.pp_funcs && + adev->powerplay.pp_funcs->enable_bapm) amdgpu_dpm_enable_bapm(adev, adev->pm.ac_power); mutex_unlock(&adev->pm.mutex);