From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Karsten Graul Subject: [PATCH net v2 02/10] net/smc: clear link during SMC client link down processing Date: Sat, 18 Jul 2020 15:06:10 +0200 Message-Id: <20200718130618.16724-3-kgraul@linux.ibm.com> In-Reply-To: <20200718130618.16724-1-kgraul@linux.ibm.com> References: <20200718130618.16724-1-kgraul@linux.ibm.com> Sender: netdev-owner@vger.kernel.org List-ID: To: davem@davemloft.net Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org, heiko.carstens@de.ibm.com, raspl@linux.ibm.com, ubraun@linux.ibm.com In a link-down condition we notify the SMC server and expect that the server will finally trigger the link clear processing on the client side. This could fail when anything along this notification path goes wrong. Clear the link as part of SMC client link-down processing to prevent dangling links. Reviewed-by: Ursula Braun Fixes: 541afa10c126 ("net/smc: add smcr_port_err() and smcr_link_down() processing") Signed-off-by: Karsten Graul --- net/smc/smc_core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index f69d205b3e11..e286b3c8c962 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -1204,10 +1204,12 @@ static void smcr_link_down(struct smc_link *lnk) SMC_LLC_WAIT_TIME); mutex_lock(&lgr->llc_conf_mutex); } - if (!list_empty(&lgr->list)) + if (!list_empty(&lgr->list)) { smc_llc_send_delete_link(to_lnk, del_link_id, SMC_LLC_REQ, true, SMC_LLC_DEL_LOST_PATH); + smcr_link_clear(lnk, true); + } wake_up(&lgr->llc_flow_waiter); /* wake up next waiter */ } } -- 2.17.1