From 882dcfe5a1785c20f45820cbe6fec4b8b647c946 Mon Sep 17 00:00:00 2001 From: Karsten Graul Date: Thu, 10 Oct 2019 10:16:10 +0200 Subject: net/smc: receive returns without data smc_cdc_rxed_any_close_or_senddone() is used as an end condition for the receive loop. This conflicts with smc_cdc_msg_recv_action() which could run in parallel and set the bits checked by smc_cdc_rxed_any_close_or_senddone() before the receive is processed. In that case we could return from receive with no data, although data is available. The same applies to smc_rx_wait(). Fix this by checking for RCV_SHUTDOWN only, which is set in smc_cdc_msg_recv_action() after the receive was actually processed. Fixes: 952310ccf2d8 ("smc: receive data from RMBE") Reviewed-by: Ursula Braun Signed-off-by: Karsten Graul Signed-off-by: Jakub Kicinski --- net/smc/smc_rx.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'net') diff --git a/net/smc/smc_rx.c b/net/smc/smc_rx.c index 413a6abf227e..000002642288 100644 --- a/net/smc/smc_rx.c +++ b/net/smc/smc_rx.c @@ -211,8 +211,7 @@ int smc_rx_wait(struct smc_sock *smc, long *timeo, rc = sk_wait_event(sk, timeo, sk->sk_err || sk->sk_shutdown & RCV_SHUTDOWN || - fcrit(conn) || - smc_cdc_rxed_any_close_or_senddone(conn), + fcrit(conn), &wait); remove_wait_queue(sk_sleep(sk), &wait); sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); @@ -310,7 +309,6 @@ int smc_rx_recvmsg(struct smc_sock *smc, struct msghdr *msg, smc_rx_update_cons(smc, 0); if (sk->sk_shutdown & RCV_SHUTDOWN || - smc_cdc_rxed_any_close_or_senddone(conn) || conn->local_tx_ctrl.conn_state_flags.peer_conn_abort) break; -- cgit v1.2.3-59-g8ed1b