diff options
| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-03-15 19:56:30 -0400 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2011-04-30 16:53:18 +0200 |
| commit | 9bcd1bb8ba9c81477d2684888facd76ff287611b (patch) | |
| tree | 65a7f12dbb506733b82f4c079fc692ea20ed898b /net/sunrpc/sched.c | |
| parent | 57557f795949d1a61af9f74b8df0f3ba792f0858 (diff) | |
SUNRPC: Ensure we always run the tk_callback before tk_action
commit e020c6800c9621a77223bf2c1ff68180e41e8ebf upstream.
This fixes a race in which the task->tk_callback() puts the rpc_task
to sleep, setting a new callback. Under certain circumstances, the current
code may end up executing the task->tk_action before it gets round to the
callback.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'net/sunrpc/sched.c')
| -rw-r--r-- | net/sunrpc/sched.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c index 385f427beda..aad8362f9cc 100644 --- a/net/sunrpc/sched.c +++ b/net/sunrpc/sched.c @@ -629,14 +629,12 @@ static void __rpc_execute(struct rpc_task *task) save_callback = task->tk_callback; task->tk_callback = NULL; save_callback(task); - } - - /* - * Perform the next FSM step. - * tk_action may be NULL when the task has been killed - * by someone else. - */ - if (!RPC_IS_QUEUED(task)) { + } else { + /* + * Perform the next FSM step. + * tk_action may be NULL when the task has been killed + * by someone else. + */ if (task->tk_action == NULL) break; task->tk_action(task); |