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nvme: Make nvme_uninit_ctrl symmetric to nvme_init_ctrl

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Put the ctrl reference count at nvme_uninit_ctrl as opposed to
nvme_init_ctrl which takes it. This decrease the reference count at the
core layer instead of decreasing it on each transport separately.
Also move the call of nvme_uninit_ctrl at PCI driver after calling to
nvme_release_prp_pools and nvme_dev_unmap, in order to put the reference
count after using the dev. This is safe because those functions use
nvme_dev which is freed only later at nvme_pci_free_ctrl.

Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Israel Rukshin 2020-03-24 17:29:42 +02:00 committed by Keith Busch
parent b780d7415a
commit 726612b6b8
6 changed files with 2 additions and 8 deletions
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2
drivers/nvme/host/core.c
View File

@ -171,7 +171,6 @@ static void nvme_do_delete_ctrl(struct nvme_ctrl *ctrl)
nvme_remove_namespaces(ctrl);
ctrl->ops->delete_ctrl(ctrl);
nvme_uninit_ctrl(ctrl);
nvme_put_ctrl(ctrl);
}
static void nvme_delete_ctrl_work(struct work_struct *work)
@ -4048,6 +4047,7 @@ void nvme_uninit_ctrl(struct nvme_ctrl *ctrl)
nvme_fault_inject_fini(&ctrl->fault_inject);
dev_pm_qos_hide_latency_tolerance(ctrl->device);
cdev_device_del(&ctrl->cdev, ctrl->device);
nvme_put_ctrl(ctrl);
}
EXPORT_SYMBOL_GPL(nvme_uninit_ctrl);

1
drivers/nvme/host/fc.c
View File

@ -3206,7 +3206,6 @@ fail_ctrl:
/* initiate nvme ctrl ref counting teardown */
nvme_uninit_ctrl(&ctrl->ctrl);
nvme_put_ctrl(&ctrl->ctrl);
/* Remove core ctrl ref. */
nvme_put_ctrl(&ctrl->ctrl);

3
drivers/nvme/host/pci.c
View File

@ -2873,10 +2873,9 @@ static void nvme_remove(struct pci_dev *pdev)
nvme_free_host_mem(dev);
nvme_dev_remove_admin(dev);
nvme_free_queues(dev, 0);
nvme_uninit_ctrl(&dev->ctrl);
nvme_release_prp_pools(dev);
nvme_dev_unmap(dev);
nvme_put_ctrl(&dev->ctrl);
nvme_uninit_ctrl(&dev->ctrl);
}
#ifdef CONFIG_PM_SLEEP

1
drivers/nvme/host/rdma.c
View File

@ -2052,7 +2052,6 @@ static struct nvme_ctrl *nvme_rdma_create_ctrl(struct device *dev,
out_uninit_ctrl:
nvme_uninit_ctrl(&ctrl->ctrl);
nvme_put_ctrl(&ctrl->ctrl);
nvme_put_ctrl(&ctrl->ctrl);
if (ret > 0)
ret = -EIO;
return ERR_PTR(ret);

1
drivers/nvme/host/tcp.c
View File

@ -2437,7 +2437,6 @@ static struct nvme_ctrl *nvme_tcp_create_ctrl(struct device *dev,
out_uninit_ctrl:
nvme_uninit_ctrl(&ctrl->ctrl);
nvme_put_ctrl(&ctrl->ctrl);
nvme_put_ctrl(&ctrl->ctrl);
if (ret > 0)
ret = -EIO;
return ERR_PTR(ret);

2
drivers/nvme/target/loop.c
View File

@ -485,7 +485,6 @@ out_destroy_admin:
out_disable:
dev_warn(ctrl->ctrl.device, "Removing after reset failure\n");
nvme_uninit_ctrl(&ctrl->ctrl);
nvme_put_ctrl(&ctrl->ctrl);
}
static const struct nvme_ctrl_ops nvme_loop_ctrl_ops = {
@ -635,7 +634,6 @@ out_free_queues:
kfree(ctrl->queues);
out_uninit_ctrl:
nvme_uninit_ctrl(&ctrl->ctrl);
nvme_put_ctrl(&ctrl->ctrl);
out_put_ctrl:
nvme_put_ctrl(&ctrl->ctrl);
if (ret > 0)