diff options
Diffstat (limited to 'net/smc/smc_core.c')
| -rw-r--r-- | net/smc/smc_core.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index 97e9d21c4d1e..cf34b9d96595 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -13,6 +13,7 @@ #include <linux/if_vlan.h> #include <linux/random.h> #include <linux/workqueue.h> +#include <linux/wait.h> #include <net/tcp.h> #include <net/sock.h> #include <rdma/ib_verbs.h> @@ -39,6 +40,9 @@ static struct smc_lgr_list smc_lgr_list = { /* established link groups */ .num = 0, }; +static atomic_t lgr_cnt; /* number of existing link groups */ +static DECLARE_WAIT_QUEUE_HEAD(lgrs_deleted); + static void smc_buf_free(struct smc_link_group *lgr, bool is_rmb, struct smc_buf_desc *buf_desc); @@ -319,6 +323,8 @@ static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini) rc = smc_wr_create_link(lnk); if (rc) goto destroy_qp; + atomic_inc(&lgr_cnt); + atomic_inc(&ini->ib_dev->lnk_cnt); } smc->conn.lgr = lgr; spin_lock_bh(lgr_lock); @@ -406,6 +412,8 @@ static void smc_link_clear(struct smc_link *lnk) smc_ib_destroy_queue_pair(lnk); smc_ib_dealloc_protection_domain(lnk); smc_wr_free_link_mem(lnk); + if (!atomic_dec_return(&lnk->smcibdev->lnk_cnt)) + wake_up(&lnk->smcibdev->lnks_deleted); } static void smcr_buf_free(struct smc_link_group *lgr, bool is_rmb, @@ -492,6 +500,8 @@ static void smc_lgr_free(struct smc_link_group *lgr) } else { smc_link_clear(&lgr->lnk[SMC_SINGLE_LINK]); put_device(&lgr->lnk[SMC_SINGLE_LINK].smcibdev->ibdev->dev); + if (!atomic_dec_return(&lgr_cnt)) + wake_up(&lgrs_deleted); } kfree(lgr); } @@ -729,6 +739,15 @@ void smc_smcr_terminate_all(struct smc_ib_device *smcibdev) list_del_init(&lgr->list); __smc_lgr_terminate(lgr, false); } + + if (smcibdev) { + if (atomic_read(&smcibdev->lnk_cnt)) + wait_event(smcibdev->lnks_deleted, + !atomic_read(&smcibdev->lnk_cnt)); + } else { + if (atomic_read(&lgr_cnt)) + wait_event(lgrs_deleted, !atomic_read(&lgr_cnt)); + } } /* Determine vlan of internal TCP socket. @@ -1263,6 +1282,12 @@ static void smc_lgrs_shutdown(void) spin_unlock(&smcd_dev_list.lock); } +int __init smc_core_init(void) +{ + atomic_set(&lgr_cnt, 0); + return 0; +} + /* Called (from smc_exit) when module is removed */ void smc_core_exit(void) { |