[ I glanced at the context and it does seem buggy - dan].
tree: git://people.freedesktop.org/~airlied/linux.git drm-i915-mst-support
head: 4ec03267a2482d9719006adcc3eec300e0243a5a
commit: 4ec03267a2482d9719006adcc3eec300e0243a5a [18/18] WIP: locking fixups
>> drivers/gpu/drm/drm_dp_mst_topology.c:379:2-8: preceding lock on line 377
>> drivers/gpu/drm/drm_dp_mst_topology.c:390:2-8: preceding lock on line 388
git remote add drm git://people.freedesktop.org/~airlied/linux.git
git remote update drm
git checkout 4ec03267a2482d9719006adcc3eec300e0243a5a
vim +379 drivers/gpu/drm/drm_dp_mst_topology.c
4ec03267 Dave Airlie 2014-05-08 371 return NULL;
4ec03267 Dave Airlie 2014-05-08 372 }
4ec03267 Dave Airlie 2014-05-08 373
4ec03267 Dave Airlie 2014-05-08 374 static struct drm_dp_mst_branch
*drm_dp_get_validated_mstb_ref(struct drm_dp_mst_topology_mgr *mgr, struct
drm_dp_mst_branch *mstb)
4ec03267 Dave Airlie 2014-05-08 375 {
4ec03267 Dave Airlie 2014-05-08 376 struct drm_dp_mst_branch *rmstb;
4ec03267 Dave Airlie 2014-05-08 @377 mutex_lock(&mgr->lock);
4ec03267 Dave Airlie 2014-05-08 378 if (!mgr->mst_primary)
4ec03267 Dave Airlie 2014-05-08 @379 return NULL;
4ec03267 Dave Airlie 2014-05-08 380 rmstb =
drm_dp_mst_get_validated_mstb_ref_locked(mgr->mst_primary, mstb);
4ec03267 Dave Airlie 2014-05-08 381 mutex_unlock(&mgr->lock);
4ec03267 Dave Airlie 2014-05-08 382 return rmstb;
4ec03267 Dave Airlie 2014-05-08 383 }
4ec03267 Dave Airlie 2014-05-08 384
4ec03267 Dave Airlie 2014-05-08 385 static struct drm_dp_mst_port
*drm_dp_get_validated_port_ref(struct drm_dp_mst_topology_mgr *mgr, struct
drm_dp_mst_port *port)
4ec03267 Dave Airlie 2014-05-08 386 {
4ec03267 Dave Airlie 2014-05-08 387 struct drm_dp_mst_port *rport;
4ec03267 Dave Airlie 2014-05-08 @388 mutex_lock(&mgr->lock);
4ec03267 Dave Airlie 2014-05-08 389 if (!mgr->mst_primary)
4ec03267 Dave Airlie 2014-05-08 @390 return NULL;
4ec03267 Dave Airlie 2014-05-08 391 rport =
drm_dp_mst_get_port_ref_locked(mgr->mst_primary, port);
4ec03267 Dave Airlie 2014-05-08 392 mutex_unlock(&mgr->lock);
4ec03267 Dave Airlie 2014-05-08 393 return rport;
---
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