nvmet: make sure discovery change log event is protected

Generation counter is protected by nvmet_config_sem. Make sure the
callers that call functions that might change it, are calling it
properly.

Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Reviewed-by: Israel Rukshin <israelr@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/nvme/target/discovery.c b/drivers/nvme/target/discovery.c
index f40c05c..682854e 100644 (file)
--- a/drivers/nvme/target/discovery.c
+++ b/drivers/nvme/target/discovery.c
@@ -69,6 +69,7 @@ void nvmet_subsys_disc_changed(struct nvmet_subsys *subsys,
        struct nvmet_port *port;
        struct nvmet_subsys_link *s;
 
+       lockdep_assert_held(&nvmet_config_sem);
        nvmet_genctr++;
 
        list_for_each_entry(port, nvmet_ports, global_entry)