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drm/dp_mst: Don't return error code when crtc is null

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[Why]
In certain cases the crtc can be NULL and returning -EINVAL causes
atomic check to fail when it shouln't. This leads to valid
configurations failing because atomic check fails.

[How]
Don't early return if crtc is null

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
[added stable cc]
Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: 8ec046716c ("drm/dp_mst: Add helper to trigger modeset on affected DSC MST CRTCs")
Cc: <stable@vger.kernel.org> # v5.6+
Link: https://patchwork.freedesktop.org/patch/msgid/20200814170140.24917-1-Bhawanpreet.Lakha@amd.com
This commit is contained in:
Bhawanpreet Lakha 2020-08-14 13:01:40 -04:00 committed by Lyude Paul
parent 836b194d65
commit 88fee1c900
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/drm_dp_mst_topology.c
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@ -4990,8 +4990,8 @@ int drm_dp_mst_add_affected_dsc_crtcs(struct drm_atomic_state *state, struct drm
crtc = conn_state->crtc;
if (WARN_ON(!crtc))
return -EINVAL;
if (!crtc)
continue;
if (!drm_dp_mst_dsc_aux_for_port(pos->port))
continue;