diff options
| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2020-04-04 19:52:21 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2020-04-04 19:59:27 -0400 |
| commit | 1fab7dc477241c12f977955aa6baea7938b6f08d (patch) | |
| tree | 0ecd0496922009cbb61398d0b6c8591b0a365c46 /net | |
| parent | 44ea8dfce021db1db6a31970b1f13a80366a1f21 (diff) | |
| download | lwn-1fab7dc477241c12f977955aa6baea7938b6f08d.tar.gz lwn-1fab7dc477241c12f977955aa6baea7938b6f08d.zip | |
SUNRPC: Don't start a timer on an already queued rpc task
Move the test for whether a task is already queued to prevent
corruption of the timer list in __rpc_sleep_on_priority_timeout().
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/sched.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c index 6eff14119a88..7eba20a88438 100644 --- a/net/sunrpc/sched.c +++ b/net/sunrpc/sched.c @@ -204,10 +204,6 @@ static void __rpc_add_wait_queue(struct rpc_wait_queue *queue, struct rpc_task *task, unsigned char queue_priority) { - WARN_ON_ONCE(RPC_IS_QUEUED(task)); - if (RPC_IS_QUEUED(task)) - return; - INIT_LIST_HEAD(&task->u.tk_wait.timer_list); if (RPC_IS_PRIORITY(queue)) __rpc_add_wait_queue_priority(queue, task, queue_priority); @@ -382,7 +378,7 @@ static void rpc_make_runnable(struct workqueue_struct *wq, * NB: An RPC task will only receive interrupt-driven events as long * as it's on a wait queue. */ -static void __rpc_sleep_on_priority(struct rpc_wait_queue *q, +static void __rpc_do_sleep_on_priority(struct rpc_wait_queue *q, struct rpc_task *task, unsigned char queue_priority) { @@ -395,12 +391,23 @@ static void __rpc_sleep_on_priority(struct rpc_wait_queue *q, } +static void __rpc_sleep_on_priority(struct rpc_wait_queue *q, + struct rpc_task *task, + unsigned char queue_priority) +{ + if (WARN_ON_ONCE(RPC_IS_QUEUED(task))) + return; + __rpc_do_sleep_on_priority(q, task, queue_priority); +} + static void __rpc_sleep_on_priority_timeout(struct rpc_wait_queue *q, struct rpc_task *task, unsigned long timeout, unsigned char queue_priority) { + if (WARN_ON_ONCE(RPC_IS_QUEUED(task))) + return; if (time_is_after_jiffies(timeout)) { - __rpc_sleep_on_priority(q, task, queue_priority); + __rpc_do_sleep_on_priority(q, task, queue_priority); __rpc_add_timer(q, task, timeout); } else task->tk_status = -ETIMEDOUT; |