blob: 0c1635d4305bc87fd86b4abe573b92161af011ef [file] [log] [blame]
From 329563ec5e17887f1248aae7eb0dc86df49c7c0e Mon Sep 17 00:00:00 2001
From: Chuck Lever <chuck.lever@oracle.com>
Date: Fri, 3 Jan 2020 11:52:17 -0500
Subject: [PATCH] xprtrdma: Fix completion wait during device removal
commit 13cb886c591f341a8759f175292ddf978ef903a1 upstream.
I've found that on occasion, "rmmod <dev>" will hang while if an NFS
is under load.
Ensure that ri_remove_done is initialized only just before the
transport is woken up to force a close. This avoids the completion
possibly getting initialized again while the CM event handler is
waiting for a wake-up.
Fixes: bebd031866ca ("xprtrdma: Support unplugging an HCA from under an NFS mount")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 3e69c423f523..638285d6602d 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -244,6 +244,7 @@ rpcrdma_cm_event_handler(struct rdma_cm_id *id, struct rdma_cm_event *event)
ia->ri_id->device->name,
rpcrdma_addrstr(r_xprt), rpcrdma_portstr(r_xprt));
#endif
+ init_completion(&ia->ri_remove_done);
set_bit(RPCRDMA_IAF_REMOVING, &ia->ri_flags);
ep->rep_connected = -ENODEV;
xprt_force_disconnect(xprt);
@@ -298,7 +299,6 @@ rpcrdma_create_id(struct rpcrdma_xprt *xprt, struct rpcrdma_ia *ia)
trace_xprtrdma_conn_start(xprt);
init_completion(&ia->ri_done);
- init_completion(&ia->ri_remove_done);
id = rdma_create_id(xprt->rx_xprt.xprt_net, rpcrdma_cm_event_handler,
xprt, RDMA_PS_TCP, IB_QPT_RC);
--
2.7.4