[PATCH 5.9 037/152] drm/amd/amdgpu: fix null pointer in runtime pm

[Greg Kroah-Hartman]

From: Kenneth Feng <kenneth.f...@amd.com>

commit 7acc79eb5f78d3d1aa5dd21fc0a0329f1b7f2be5 upstream.

fix the null pointer issue when runtime pm is triggered.

Signed-off-by: Kenneth Feng <kenneth.f...@amd.com>
Reviewed-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Cc: sta...@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -4593,7 +4593,7 @@ int amdgpu_device_baco_enter(struct drm_
        if (!amdgpu_device_supports_baco(adev->ddev))
                return -ENOTSUPP;
 
-       if (ras && ras->supported)
+       if (ras && ras->supported && 
adev->nbio.funcs->enable_doorbell_interrupt)
                adev->nbio.funcs->enable_doorbell_interrupt(adev, false);
 
        return amdgpu_dpm_baco_enter(adev);
@@ -4612,7 +4612,7 @@ int amdgpu_device_baco_exit(struct drm_d
        if (ret)
                return ret;
 
-       if (ras && ras->supported)
+       if (ras && ras->supported && 
adev->nbio.funcs->enable_doorbell_interrupt)
                adev->nbio.funcs->enable_doorbell_interrupt(adev, true);
 
        return 0;