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RDMA/core: Use simpler device_del() instead of device_unregister()

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Instead of holding extra reference using get_device() that
device_unregister() releases, simplify it as below.

device_add() balances with device_del().  device_initialize() balances
with put_device(), always via ib_dealloc_device().

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Parav Pandit 2019-02-13 19:23:03 +02:00 committed by Jason Gunthorpe
parent cfe876d8e6
commit e155755e53
2 changed files with 3 additions and 5 deletions
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1
drivers/infiniband/core/device.c
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@ -369,6 +369,7 @@ void ib_dealloc_device(struct ib_device *device)
WARN_ON(!xa_empty(&device->client_data)); WARN_ON(!xa_empty(&device->client_data));
WARN_ON(refcount_read(&device->refcount)); WARN_ON(refcount_read(&device->refcount));
rdma_restrack_clean(device); rdma_restrack_clean(device);
/* Balances with device_initialize */
put_device(&device->dev); put_device(&device->dev);
} }
EXPORT_SYMBOL(ib_dealloc_device); EXPORT_SYMBOL(ib_dealloc_device);

7
drivers/infiniband/core/sysfs.c
View File

@ -1351,15 +1351,12 @@ int ib_device_register_sysfs(struct ib_device *device)
void ib_device_unregister_sysfs(struct ib_device *device) void ib_device_unregister_sysfs(struct ib_device *device)
{ {
/* Hold device until ib_dealloc_device() */
get_device(&device->dev);
free_port_list_attributes(device); free_port_list_attributes(device);
if (device->hw_stats) { if (device->hw_stats) {
kfree(device->hw_stats); kfree(device->hw_stats);
free_hsag(&device->dev.kobj, device->hw_stats_ag); free_hsag(&device->dev.kobj, device->hw_stats_ag);
} }
/* Balances with device_add */
device_unregister(&device->dev); device_del(&device->dev);
} }