From: Ville Syrjälä Date: Wed, 12 Jul 2017 15:51:00 +0000 (+0300) Subject: drm/dp/mst: Handle errors from drm_atomic_get_private_obj_state() correctly X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=56a91c4932bd038f3d1f6555ddc349ca4e6933b0;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git drm/dp/mst: Handle errors from drm_atomic_get_private_obj_state() correctly 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@vger.kernel.org Cc: Dhinakaran Pandiyan Cc: Harry Wentland Cc: Maarten Lankhorst Fixes: edb1ed1ab7d3 ("drm/dp: Add DP MST helpers to atomically find and release vcpi slots") Signed-off-by: Ville Syrjälä Link: http://patchwork.freedesktop.org/patch/msgid/20170712155102.26276-1-ville.syrjala@linux.intel.com Reviewed-by: Dhinakaran Pandiyan --- 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