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authorTrond Myklebust <Trond.Myklebust@netapp.com>2012-05-19 12:12:53 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-06-10 00:36:09 +0900
commitc7faf5bbaeba30053627de3b333d3c17e051ba80 (patch)
treeb64389cc38ef5aac36ce7dff7e084aaf3738ffd9 /net
parent7a0786dcc32e5d16721449d43cfb90d7869d08ea (diff)
sunrpc: fix loss of task->tk_status after rpc_delay call in xprt_alloc_slot
commit 1afeaf5c29aa07db25760d2fbed5c08a3aec3498 upstream. 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> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/clnt.c2
-rw-r--r--net/sunrpc/xprt.c5
2 files changed, 5 insertions, 2 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index adf2990acebf..25302c802460 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1288,6 +1288,8 @@ call_reserveresult(struct rpc_task *task)
}
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 0cbcd1ab49ab..da72492360b8 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -984,15 +984,16 @@ static void xprt_alloc_slot(struct rpc_task *task)
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;