From: Cong Liu <liucong2@kylinos.cn> stable inclusion from stable-v6.6.2 commit 8b72c5d4a5d25e76b16283397c40b8b3c0d70019 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8IW7G Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit 0c3601a2fbfb265ce283651480e30c8e60459112 ] This patch fixes a null pointer dereference in the error message that is printed when the Display Core (DC) fails to initialize. The original message includes the DC version number, which is undefined if the DC is not initialized. Fixes: 9788d087caff ("drm/amd/display: improve the message printed when loading DC") Signed-off-by: Cong Liu <liucong2@kylinos.cn> Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 868946dd7ef1..4120ae9d1024 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1692,8 +1692,7 @@ static int amdgpu_dm_init(struct amdgpu_device *adev) DRM_INFO("Display Core v%s initialized on %s\n", DC_VER, dce_version_to_string(adev->dm.dc->ctx->dce_version)); } else { - DRM_INFO("Display Core v%s failed to initialize on %s\n", DC_VER, - dce_version_to_string(adev->dm.dc->ctx->dce_version)); + DRM_INFO("Display Core failed to initialize with v%s!\n", DC_VER); goto error; } -- 2.25.1