NFSv4.1 wake up all tasks on un-connected DS slot table waitq

The DS has a connection error (invalid deviceid). Drain the fore channel
slot table waitq.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index 1b9bedb89620..a63062d3882f 100644
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -133,6 +133,7 @@ static int filelayout_async_handle_error(struct rpc_task *task,
         struct nfs_server *mds_server = NFS_SERVER(inode);
         struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg);
         struct nfs_client *mds_client = mds_server->nfs_client;
+        struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table;
 
         if (task->tk_status >= 0)
                 return 0;
@@ -186,6 +187,7 @@ static int filelayout_async_handle_error(struct rpc_task *task,
                 dprintk("%s DS connection error %d\n", __func__,
                         task->tk_status);
                 filelayout_mark_devid_invalid(devid);
+                rpc_wake_up(&tbl->slot_tbl_waitq);
                 /* fall through */
         default:
                 dprintk("%s Retry through MDS. Error %d\n", __func__,