From f025c48958104868a9fceb04696cdfdb056794c9 Mon Sep 17 00:00:00 2001 From: Matan Barak Date: Tue, 18 Apr 2017 12:03:38 +0300 Subject: [PATCH] IB/core: Don't pass the lock state to _rdma_remove_commit_uobject The only scenario where this function was called while the lock is already taken is in the context cleanup scenario. Thus, in order not to pass the lock state to this function, we just call the remove logic straight from the cleanup context function. Fixes: 3832125624b7 ('IB/core: Add support for idr types') Signed-off-by: Matan Barak Reviewed-by: Sean Hefty Signed-off-by: Doug Ledford --- drivers/infiniband/core/rdma_core.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/infiniband/core/rdma_core.c b/drivers/infiniband/core/rdma_core.c index 88d1e596f910..699a6595e7cf 100644 --- a/drivers/infiniband/core/rdma_core.c +++ b/drivers/infiniband/core/rdma_core.c @@ -363,8 +363,7 @@ static void lockdep_check(struct ib_uobject *uobj, bool exclusive) } static int __must_check _rdma_remove_commit_uobject(struct ib_uobject *uobj, - enum rdma_remove_reason why, - bool lock) + enum rdma_remove_reason why) { int ret; struct ib_ucontext *ucontext = uobj->context; @@ -375,11 +374,9 @@ static int __must_check _rdma_remove_commit_uobject(struct ib_uobject *uobj, atomic_set(&uobj->usecnt, 0); uobj->type->type_class->lookup_put(uobj, true); } else { - if (lock) - mutex_lock(&ucontext->uobjects_lock); + mutex_lock(&ucontext->uobjects_lock); list_del(&uobj->list); - if (lock) - mutex_unlock(&ucontext->uobjects_lock); + mutex_unlock(&ucontext->uobjects_lock); /* put the ref we took when we created the object */ uverbs_uobject_put(uobj); } @@ -401,7 +398,7 @@ int __must_check rdma_remove_commit_uobject(struct ib_uobject *uobj) return 0; } lockdep_check(uobj, true); - ret = _rdma_remove_commit_uobject(uobj, RDMA_REMOVE_DESTROY, true); + ret = _rdma_remove_commit_uobject(uobj, RDMA_REMOVE_DESTROY); up_read(&ucontext->cleanup_rwsem); return ret; @@ -534,8 +531,7 @@ static void _uverbs_close_fd(struct ib_uobject_file *uobj_file) goto unlock; ucontext = uobj_file->uobj.context; - ret = _rdma_remove_commit_uobject(&uobj_file->uobj, RDMA_REMOVE_CLOSE, - true); + ret = _rdma_remove_commit_uobject(&uobj_file->uobj, RDMA_REMOVE_CLOSE); up_read(&ucontext->cleanup_rwsem); if (ret) pr_warn("uverbs: unable to clean up uobject file in uverbs_close_fd.\n"); @@ -583,7 +579,7 @@ void uverbs_cleanup_ucontext(struct ib_ucontext *ucontext, bool device_removed) */ mutex_lock(&ucontext->uobjects_lock); list_for_each_entry_safe(obj, next_obj, &ucontext->uobjects, - list) + list) { if (obj->type->destroy_order == cur_order) { int ret; @@ -592,15 +588,19 @@ void uverbs_cleanup_ucontext(struct ib_ucontext *ucontext, bool device_removed) * racing with a lookup_get. */ WARN_ON(uverbs_try_lock_object(obj, true)); - ret = _rdma_remove_commit_uobject(obj, reason, - false); + ret = obj->type->type_class->remove_commit(obj, + reason); + list_del(&obj->list); if (ret) pr_warn("ib_uverbs: failed to remove uobject id %d order %u\n", obj->id, cur_order); + /* put the ref we took when we created the object */ + uverbs_uobject_put(obj); } else { next_order = min(next_order, obj->type->destroy_order); } + } mutex_unlock(&ucontext->uobjects_lock); cur_order = next_order; } -- 2.30.2