ib_clients can indeed fill .add to NULL, but then they will not see any device removal notifications. The reason is that that ib_register_client and ib_register_device checked existence of .add before adding the creating a corresponding client_data and adding it to the list. Simple condition reverse fixes the issue. Reviewed-by: Johannes Thumshirn <jthumshirn@xxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> Signed-off-by: Sagi Grimberg <sagi@xxxxxxxxxxx> --- drivers/infiniband/core/device.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c index 81d447da0048..26eb428af473 100644 --- a/drivers/infiniband/core/device.c +++ b/drivers/infiniband/core/device.c @@ -414,7 +414,7 @@ int ib_register_device(struct ib_device *device, device->reg_state = IB_DEV_REGISTERED; list_for_each_entry(client, &client_list, list) - if (client->add && !add_client_context(device, client)) + if (!add_client_context(device, client) && client->add) client->add(device); down_write(&lists_rwsem); @@ -499,7 +499,7 @@ int ib_register_client(struct ib_client *client) mutex_lock(&device_mutex); list_for_each_entry(device, &device_list, core_list) - if (client->add && !add_client_context(device, client)) + if (!add_client_context(device, client) && client->add) client->add(device); down_write(&lists_rwsem); -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
