[PATCH 1/2] xprtrdma: Fix I3 invariant comment in rpcrdma_complete_rqst

From: Chuck Lever <[email protected]>

frwr_unmap_sync() and frwr_unmap_async() drain rl_registered via
rpcrdma_mr_pop() before posting invalidation Work Requests to
hardware.  The WARN_ON_ONCE verifies that the list-drain step
has occurred, not that hardware unmapping has completed.

Reword the comment to match what the assertion actually checks.

Signed-off-by: Chuck Lever <[email protected]>
---
 net/sunrpc/xprtrdma/rpc_rdma.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 626cadec4555..f115baba6d56 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -1336,8 +1336,8 @@ void rpcrdma_complete_rqst(struct rpcrdma_rep *rep)
 	struct rpc_rqst *rqst = rep->rr_rqst;
 	int status;
 
-	/* I3: every registered MR has been invalidated and
-	 * ib_dma_unmap_sg()'d before complete_rqst runs.
+	/* I3: rl_registered has been drained by frwr_unmap before
+	 * complete_rqst runs.
 	 */
 	WARN_ON_ONCE(!list_empty(&rpcr_to_rdmar(rqst)->rl_registered));
 
-- 
2.54.0