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| author | Karsten Graul <kgraul@linux.ibm.com> | 2019-10-10 11:16:10 +0300 |
|---|---|---|
| committer | Jakub Kicinski <jakub.kicinski@netronome.com> | 2019-10-11 05:08:41 +0300 |
| commit | 882dcfe5a1785c20f45820cbe6fec4b8b647c946 (patch) | |
| tree | 7f11be8258d79a3d48af2953b66eb796e2d3651b /net/smc/smc_rx.c | |
| parent | 29ee2701529e1905c0e948688f9688c68c8d4ea4 (diff) | |
| download | linux-882dcfe5a1785c20f45820cbe6fec4b8b647c946.tar.xz | |
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 <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Diffstat (limited to 'net/smc/smc_rx.c')
| -rw-r--r-- | net/smc/smc_rx.c | 4 |
1 files changed, 1 insertions, 3 deletions
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; |