Defensive clean up: Protect the rb_all_reps list during rep
creation.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
net/sunrpc/xprtrdma/verbs.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index f3482fd67ec2..0ade69501061 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -963,13 +963,11 @@ static void rpcrdma_reqs_reset(struct rpcrdma_xprt *r_xprt)
rpcrdma_req_reset(req);
}
-/* No locking needed here. This function is called only by the
- * Receive completion handler.
- */
static noinline
struct rpcrdma_rep *rpcrdma_rep_create(struct rpcrdma_xprt *r_xprt,
bool temp)
{
+ struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
struct rpcrdma_rep *rep;
rep = kzalloc(sizeof(*rep), GFP_KERNEL);
@@ -996,7 +994,10 @@ struct rpcrdma_rep *rpcrdma_rep_create(struct rpcrdma_xprt *r_xprt,
rep->rr_recv_wr.sg_list = &rep->rr_rdmabuf->rg_iov;
rep->rr_recv_wr.num_sge = 1;
rep->rr_temp = temp;
- list_add(&rep->rr_all, &r_xprt->rx_buf.rb_all_reps);
+
+ spin_lock(&buf->rb_lock);
+ list_add(&rep->rr_all, &buf->rb_all_reps);
+ spin_unlock(&buf->rb_lock);
return rep;
out_free_regbuf:
