[PATCH] drm/amdgpu: fix null ptr access

[Flora Cui]

check null ptr first before access its element

Signed-off-by: Flora Cui <flora....@amd.com>
---
 drivers/gpu/drm/amd/pm/amdgpu_dpm.c       | 2 +-
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c 
b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
index f0daa66f5b3d..5fc33893a68c 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
@@ -463,7 +463,7 @@ int amdgpu_pm_load_smu_firmware(struct amdgpu_device *adev, 
uint32_t *smu_versio
        const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
        int r = 0;
 
-       if (!pp_funcs->load_firmware)
+       if (!pp_funcs || !pp_funcs->load_firmware)
                return 0;
 
        mutex_lock(&adev->pm.mutex);
diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c 
b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index 828cb932f6a9..aa640a9c6137 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -3281,7 +3281,7 @@ void amdgpu_smu_stb_debug_fs_init(struct amdgpu_device 
*adev)
 
        struct smu_context *smu = adev->powerplay.pp_handle;
 
-       if (!smu->stb_context.stb_buf_size)
+       if (!smu || !smu->stb_context.stb_buf_size)
                return;
 
        debugfs_create_file_size("amdgpu_smu_stb_dump",
-- 
2.25.1