| Message ID | 20230312191751.183450-2-hdegoede@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/amd/display: Pass proper parent for DM backlight device v3 | expand |
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 009ef917dad4..42b88ab5552d 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -4180,9 +4180,10 @@ amdgpu_dm_register_backlight_device(struct amdgpu_display_manager *dm) &amdgpu_dm_backlight_ops, &props); - if (IS_ERR(dm->backlight_dev[dm->num_of_edps])) + if (IS_ERR(dm->backlight_dev[dm->num_of_edps])) { DRM_ERROR("DM: Backlight registration failed!\n"); - else + dm->backlight_dev[dm->num_of_edps] = NULL; + } else DRM_DEBUG_DRIVER("DM: Registered Backlight device: %s\n", bl_name); }
backlight_device_register() returns an ERR_PTR on error, but other code such as amdgpu_dm_connector_destroy() assumes dm->backlight_dev[i] is NULL if no backlight is registered. Clear dm->backlight_dev[i] on registration failure, to avoid other code trying to deref an ERR_PTR pointer. Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)