From: Likun Gao <Likun.Gao@amd.com>
Date: Wed, 12 Jan 2022 07:38:24 +0000 (+0800)
Subject: drm/amd/pm: fix NULL pointer issue of amdgpu_smu_stb_debug_fs_init
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6f3c9dbb65be3d90eee1b90e270c4e62b15a91b3;p=linux.git

drm/amd/pm: fix NULL pointer issue of amdgpu_smu_stb_debug_fs_init

Fix NULL pointer issue on amdgpu_smu_stb_debug_fs_init if SMU block not
enabled.

Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index f1544755d8b46..904d516c040b1 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -3031,7 +3031,7 @@ 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",