drm/amdgpu: Fix the null pointer dereference to ras_manager

[ Upstream commit 4c11d30c95576937c6c35e6f29884761f2dddb43 ]

Check ras_manager before using it

Signed-off-by: Ma Jun <Jun.Ma2@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 1adc81a55734d9252b79fcb1d75b52bcbfad6b34..0c4ee06451e9cf8a52a1fb14113034806a876289 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -2172,12 +2172,15 @@ static void amdgpu_ras_interrupt_process_handler(struct work_struct *work)
 int amdgpu_ras_interrupt_dispatch(struct amdgpu_device *adev,
                struct ras_dispatch_if *info)
 {
-       struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
-       struct ras_ih_data *data = &obj->ih_data;
+       struct ras_manager *obj;
+       struct ras_ih_data *data;
 
+       obj = amdgpu_ras_find_obj(adev, &info->head);
        if (!obj)
                return -EINVAL;
 
+       data = &obj->ih_data;
+
        if (data->inuse == 0)
                return 0;