On Wed, 2017-07-12 at 18:51 +0300, ville.syrjala@xxxxxxxxxxxxxxx wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> On failure drm_atomic_get_private_obj_state() returns and error
> pointer instead of NULL. Adjust the checks in the callers to match.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> Cc: Harry Wentland <harry.wentland@xxxxxxx>
> Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Thanks for fixing this,
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> Fixes: edb1ed1ab7d3 ("drm/dp: Add DP MST helpers to atomically find and release vcpi slots")
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/drm_dp_mst_topology.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
> index bfd237c15e76..18cecd94acb6 100644
> --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> @@ -2515,8 +2515,8 @@ int drm_dp_atomic_find_vcpi_slots(struct drm_atomic_state *state,
> int req_slots;
>
> topology_state = drm_atomic_get_mst_topology_state(state, mgr);
> - if (topology_state == NULL)
> - return -ENOMEM;
> + if (IS_ERR(topology_state))
> + return PTR_ERR(topology_state);
>
> port = drm_dp_get_validated_port_ref(mgr, port);
> if (port == NULL)
> @@ -2555,8 +2555,8 @@ int drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state,
> struct drm_dp_mst_topology_state *topology_state;
>
> topology_state = drm_atomic_get_mst_topology_state(state, mgr);
> - if (topology_state == NULL)
> - return -ENOMEM;
> + if (IS_ERR(topology_state))
> + return PTR_ERR(topology_state);
>
> /* We cannot rely on port->vcpi.num_slots to update
> * topology_state->avail_slots as the port may not exist if the parent
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