sunrpc: fix loss of task->tk_status after rpc_delay call in xprt_alloc_slot
xprt_alloc_slot will call rpc_delay() to make the task wait a bit before
retrying when it gets back an -ENOMEM error from xprt_dynamic_alloc_slot.
The problem is that rpc_delay will clear the task->tk_status, causing
call_reserveresult to abort the task.
The solution is simply to let call_reserveresult handle the ENOMEM error
directly.
Reported-by: Jeff Layton <jlayton@redhat.com>
Cc: stable@vger.kernel.org [>= 3.1]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index adf2990..25302c8 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1288,6 +1288,8 @@
}
switch (status) {
+ case -ENOMEM:
+ rpc_delay(task, HZ >> 2);
case -EAGAIN: /* woken up; retry */
task->tk_action = call_reserve;
return;
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index b239e75..d7ccd79 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -984,15 +984,16 @@
goto out_init_req;
switch (PTR_ERR(req)) {
case -ENOMEM:
- rpc_delay(task, HZ >> 2);
dprintk("RPC: dynamic allocation of request slot "
"failed! Retrying\n");
+ task->tk_status = -ENOMEM;
break;
case -EAGAIN:
rpc_sleep_on(&xprt->backlog, task, NULL);
dprintk("RPC: waiting for request slot\n");
+ default:
+ task->tk_status = -EAGAIN;
}
- task->tk_status = -EAGAIN;
return;
out_init_req:
task->tk_status = 0;