diff options
| author | Karsten Graul <kgraul@linux.ibm.com> | 2018-10-25 13:25:28 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-10-26 15:59:35 -0700 |
| commit | fb692ec4117f6fd25044cfb5720d6b79d400dc65 (patch) | |
| tree | b01ee2b1e809ef6e8cd1e8e18446bb3f46f06c80 | |
| parent | ee1abcf689353f36d9322231b4320926096bdee0 (diff) | |
| download | linux-fb692ec4117f6fd25044cfb5720d6b79d400dc65.tar.bz2 | |
net/smc: fix smc_buf_unuse to use the lgr pointer
The pointer to the link group is unset in the smc connection structure
right before the call to smc_buf_unuse. Provide the lgr pointer to
smc_buf_unuse explicitly.
And move the call to smc_lgr_schedule_free_work to the end of
smc_conn_free.
Fixes: a6920d1d130c ("net/smc: handle unregistered buffers")
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/smc/smc_core.c | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index e871368500e3..18daebcef181 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -122,22 +122,17 @@ static void __smc_lgr_unregister_conn(struct smc_connection *conn) sock_put(&smc->sk); /* sock_hold in smc_lgr_register_conn() */ } -/* Unregister connection and trigger lgr freeing if applicable +/* Unregister connection from lgr */ static void smc_lgr_unregister_conn(struct smc_connection *conn) { struct smc_link_group *lgr = conn->lgr; - int reduced = 0; write_lock_bh(&lgr->conns_lock); if (conn->alert_token_local) { - reduced = 1; __smc_lgr_unregister_conn(conn); } write_unlock_bh(&lgr->conns_lock); - if (!reduced || lgr->conns_num) - return; - smc_lgr_schedule_free_work(lgr); } /* Send delete link, either as client to request the initiation @@ -291,7 +286,8 @@ out: return rc; } -static void smc_buf_unuse(struct smc_connection *conn) +static void smc_buf_unuse(struct smc_connection *conn, + struct smc_link_group *lgr) { if (conn->sndbuf_desc) conn->sndbuf_desc->used = 0; @@ -301,8 +297,6 @@ static void smc_buf_unuse(struct smc_connection *conn) conn->rmb_desc->used = 0; } else { /* buf registration failed, reuse not possible */ - struct smc_link_group *lgr = conn->lgr; - write_lock_bh(&lgr->rmbs_lock); list_del(&conn->rmb_desc->list); write_unlock_bh(&lgr->rmbs_lock); @@ -315,16 +309,21 @@ static void smc_buf_unuse(struct smc_connection *conn) /* remove a finished connection from its link group */ void smc_conn_free(struct smc_connection *conn) { - if (!conn->lgr) + struct smc_link_group *lgr = conn->lgr; + + if (!lgr) return; - if (conn->lgr->is_smcd) { + if (lgr->is_smcd) { smc_ism_unset_conn(conn); tasklet_kill(&conn->rx_tsklet); } else { smc_cdc_tx_dismiss_slots(conn); } - smc_lgr_unregister_conn(conn); - smc_buf_unuse(conn); + smc_lgr_unregister_conn(conn); /* unsets conn->lgr */ + smc_buf_unuse(conn, lgr); /* allow buffer reuse */ + + if (!lgr->conns_num) + smc_lgr_schedule_free_work(lgr); } static void smc_link_clear(struct smc_link *lnk) |