[PATCH 4/6] drm/ttm: Force re-init if ttm_global_init() fails

[Jason Ekstrand]

If we have a failure, decrement the reference count so that the next
call to ttm_global_init() will actually do something instead of assume
everything is all set up.

Signed-off-by: Jason Ekstrand <jason at jlekstrand.net>
Fixes: 62b53b37e4b1 ("drm/ttm: use a static ttm_bo_global instance")
Cc: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/ttm/ttm_device.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_device.c
index 5f31acec3ad76..519deea8e39b7 100644
--- a/drivers/gpu/drm/ttm/ttm_device.c
+++ b/drivers/gpu/drm/ttm/ttm_device.c
@@ -100,6 +100,8 @@ static int ttm_global_init(void)
 	debugfs_create_atomic_t("buffer_objects", 0444, ttm_debugfs_root,
 				&glob->bo_count);
 out:
+	if (ret)
+		--ttm_glob_use_count;
 	mutex_unlock(&ttm_global_mutex);
 	return ret;
 }
-- 
2.31.1