diff options
Diffstat (limited to 'net/smc/smc_ib.c')
| -rw-r--r-- | net/smc/smc_ib.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c index 562a52d01ad1..1c314dbdc7fa 100644 --- a/net/smc/smc_ib.c +++ b/net/smc/smc_ib.c @@ -16,6 +16,7 @@ #include <linux/workqueue.h> #include <linux/scatterlist.h> #include <linux/wait.h> +#include <linux/mutex.h> #include <rdma/ib_verbs.h> #include <rdma/ib_cache.h> @@ -33,7 +34,7 @@ #define SMC_QP_RNR_RETRY 7 /* 7: infinite */ struct smc_ib_devices smc_ib_devices = { /* smc-registered ib devices */ - .lock = __SPIN_LOCK_UNLOCKED(smc_ib_devices.lock), + .mutex = __MUTEX_INITIALIZER(smc_ib_devices.mutex), .list = LIST_HEAD_INIT(smc_ib_devices.list), }; @@ -505,6 +506,10 @@ long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev) int cqe_size_order, smc_order; long rc; + mutex_lock(&smcibdev->mutex); + rc = 0; + if (smcibdev->initialized) + goto out; /* the calculated number of cq entries fits to mlx5 cq allocation */ cqe_size_order = cache_line_size() == 128 ? 7 : 6; smc_order = MAX_ORDER - cqe_size_order - 1; @@ -516,7 +521,7 @@ long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev) rc = PTR_ERR_OR_ZERO(smcibdev->roce_cq_send); if (IS_ERR(smcibdev->roce_cq_send)) { smcibdev->roce_cq_send = NULL; - return rc; + goto out; } smcibdev->roce_cq_recv = ib_create_cq(smcibdev->ibdev, smc_wr_rx_cq_handler, NULL, @@ -528,21 +533,26 @@ long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev) } smc_wr_add_dev(smcibdev); smcibdev->initialized = 1; - return rc; + goto out; err: ib_destroy_cq(smcibdev->roce_cq_send); +out: + mutex_unlock(&smcibdev->mutex); return rc; } static void smc_ib_cleanup_per_ibdev(struct smc_ib_device *smcibdev) { + mutex_lock(&smcibdev->mutex); if (!smcibdev->initialized) - return; + goto out; smcibdev->initialized = 0; ib_destroy_cq(smcibdev->roce_cq_recv); ib_destroy_cq(smcibdev->roce_cq_send); smc_wr_remove_dev(smcibdev); +out: + mutex_unlock(&smcibdev->mutex); } static struct ib_client smc_ib_client; @@ -565,9 +575,10 @@ static int smc_ib_add_dev(struct ib_device *ibdev) INIT_WORK(&smcibdev->port_event_work, smc_ib_port_event_work); atomic_set(&smcibdev->lnk_cnt, 0); init_waitqueue_head(&smcibdev->lnks_deleted); - spin_lock(&smc_ib_devices.lock); + mutex_init(&smcibdev->mutex); + mutex_lock(&smc_ib_devices.mutex); list_add_tail(&smcibdev->list, &smc_ib_devices.list); - spin_unlock(&smc_ib_devices.lock); + mutex_unlock(&smc_ib_devices.mutex); ib_set_client_data(ibdev, &smc_ib_client, smcibdev); INIT_IB_EVENT_HANDLER(&smcibdev->event_handler, smcibdev->ibdev, smc_ib_global_event_handler); @@ -602,9 +613,9 @@ static void smc_ib_remove_dev(struct ib_device *ibdev, void *client_data) { struct smc_ib_device *smcibdev = client_data; - spin_lock(&smc_ib_devices.lock); + mutex_lock(&smc_ib_devices.mutex); list_del_init(&smcibdev->list); /* remove from smc_ib_devices */ - spin_unlock(&smc_ib_devices.lock); + mutex_unlock(&smc_ib_devices.mutex); pr_warn_ratelimited("smc: removing ib device %s\n", smcibdev->ibdev->name); smc_smcr_terminate_all(smcibdev); |