diff options
| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-03-15 19:56:30 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-03-23 13:04:03 -0700 |
| commit | bac39af7892a94d7212ad9c5d269a6ac6d1d5fde (patch) | |
| tree | 2db1298fe08116d4eddfbe3a81e3a06316bb8d2b /net | |
| parent | 0b67526b4e76946e2b2e2da4cf8175ad78ae2879 (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')
| -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 59e599498e37..17c3e3aade29 100644 --- a/net/sunrpc/sched.c +++ b/net/sunrpc/sched.c @@ -637,14 +637,12 @@ 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); |