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drm/amdgpu: Fix oops when pp_funcs is unset in ACPI event

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commit 5932d260a8 upstream.

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 <aaron.ma@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Aaron Ma 2020-04-03 22:34:19 +08:00 committed by Greg Kroah-Hartman
parent 9d0dc9fb94
commit 74edc32fda
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
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@ -71,7 +71,8 @@ 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);
}