linux-kernel - [PATCH 0/2] drm/dp_mst: Fix link address probing regressions

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Date:   Fri,  6 Mar 2020 18:49:20 -0500
From:   Lyude Paul <lyude@...hat.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     "Alex Deucher" <alexander.deucher@....com>,
        "Daniel Vetter" <daniel@...ll.ch>,
        "Mikita Lipski" <mikita.lipski@....com>,
        "David Airlie" <airlied@...ux.ie>,
        "David Francis" <david.francis@....com>,
        "Maarten Lankhorst" <maarten.lankhorst@...ux.intel.com>,
        linux-kernel@...r.kernel.org,
        "Harry Wentland" <harry.wentland@....com>,
        "Thomas Zimmermann" <tzimmermann@...e.de>,
        "Maxime Ripard" <mripard@...nel.org>,
        "Lyude Paul" <lyude@...hat.com>,
        "Benjamin Gaignard" <benjamin.gaignard@...com>
Subject: [PATCH 0/2] drm/dp_mst: Fix link address probing regressions

While fixing some regressions caused by introducing bandwidth checking
into the DP MST atomic helpers, I realized there was another much more
subtle regression that got introduced by a seemingly harmless patch to
fix unused variable errors while compiling with W=1 (mentioned in patch
2). Basically, this regression makes it so sometimes link address
appears to "hang". This patch series fixes it.

Lyude Paul (2):
  drm/dp_mst: Make drm_dp_mst_dpcd_write() consistent with
    drm_dp_dpcd_write()
  drm/dp_mst: Fix drm_dp_check_mstb_guid() return code

 drivers/gpu/drm/drm_dp_mst_topology.c | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

-- 
2.24.1