diff options
Diffstat (limited to 'drivers/nvme/host/rdma.c')
| -rw-r--r-- | drivers/nvme/host/rdma.c | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index ab545fb347a0..15b0c1d025f5 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -1351,9 +1351,15 @@ static int nvme_rdma_device_unplug(struct nvme_rdma_queue *queue) ret = 1; } - /* Queue controller deletion */ + /* + * Queue controller deletion. Keep a reference until all + * work is flushed since delete_work will free the ctrl mem + */ + kref_get(&ctrl->ctrl.kref); queue_work(nvme_rdma_wq, &ctrl->delete_work); flush_work(&ctrl->delete_work); + nvme_put_ctrl(&ctrl->ctrl); + return ret; } @@ -1700,15 +1706,19 @@ static int __nvme_rdma_del_ctrl(struct nvme_rdma_ctrl *ctrl) static int nvme_rdma_del_ctrl(struct nvme_ctrl *nctrl) { struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl); - int ret; + int ret = 0; + /* + * Keep a reference until all work is flushed since + * __nvme_rdma_del_ctrl can free the ctrl mem + */ + if (!kref_get_unless_zero(&ctrl->ctrl.kref)) + return -EBUSY; ret = __nvme_rdma_del_ctrl(ctrl); - if (ret) - return ret; - - flush_work(&ctrl->delete_work); - - return 0; + if (!ret) + flush_work(&ctrl->delete_work); + nvme_put_ctrl(&ctrl->ctrl); + return ret; } static void nvme_rdma_remove_ctrl_work(struct work_struct *work) |