linux-kernel - [PATCH v2 0/2] drm/ttm: Cleanup state in global ttm structures

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Date:   Tue, 16 Apr 2019 01:50:33 +0000
From:   Brian Yip <itsbriany@...il.com>
To:     christian.koenig@....com
Cc:     ray.huang@....com, Jerry.Zhang@....com, airlied@...ux.ie,
        daniel@...ll.ch, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Brian Yip <itsbriany@...il.com>
Subject: [PATCH v2 0/2] drm/ttm: Cleanup state in global ttm structures

State in global ttm structures was not properly reset on cleanup.

In the scenario where multiple drm drivers are loaded and the first one 
fails to initialize, there is an attempt to reset the global state in
the ttm structures. However, there were some attributes which were not
properly reset during this process. This resulted in a crash and 
false positive kobj initialization warnings during subsequent initialization
of these global structures.

Fix the crash and false positive kobj initialization warnings.

---
Changes in v2:

State in global ttm structures is reset by means of zeroing memory
in global structure initialization functions rather than checking
reference counters in their corresponding release functions.

Brian Yip (2):
  drm/ttm: Reset ttm_mem_global when initialized
  drm/ttm: Reset ttm_bo_glob when initialized

 drivers/gpu/drm/ttm/ttm_bo.c     | 6 +++++-
 drivers/gpu/drm/ttm/ttm_memory.c | 2 ++
 2 files changed, 7 insertions(+), 1 deletion(-)

-- 
2.20.1