xprtrdma: Cancel refresh worker during buffer shutdown

[ Upstream commit 9378b274e1eb6925db315e345f48850d2d5d9789 ]

Trying to create MRs while the transport is being torn down can
cause a crash.

Fixes: e2ac236c0b65 ("xprtrdma: Allocate MRs on demand")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 69502fa..1a2b1f6 100644 (file)
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -1054,6 +1054,7 @@ void
 rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf)
 {
        cancel_delayed_work_sync(&buf->rb_recovery_worker);
+       cancel_delayed_work_sync(&buf->rb_refresh_worker);
 
        while (!list_empty(&buf->rb_recv_bufs)) {
                struct rpcrdma_rep *rep;