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-rw-r--r--net/sunrpc/xprtrdma/verbs.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 2bc4589c37ce..baf4b8c99d4c 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -1041,6 +1041,10 @@ static void rpcrdma_rep_put(struct rpcrdma_buffer *buf,
llist_add(&rep->rr_node, &buf->rb_free_reps);
}
+/* Caller must ensure the QP is quiescent (RQ is drained) before
+ * invoking this function, to guarantee rb_all_reps is not
+ * changing.
+ */
static void rpcrdma_reps_unmap(struct rpcrdma_xprt *r_xprt)
{
struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
@@ -1048,7 +1052,7 @@ static void rpcrdma_reps_unmap(struct rpcrdma_xprt *r_xprt)
list_for_each_entry(rep, &buf->rb_all_reps, rr_all) {
rpcrdma_regbuf_dma_unmap(rep->rr_rdmabuf);
- rep->rr_temp = true;
+ rep->rr_temp = true; /* Mark this rep for destruction */
}
}