net/tls: narrow down the critical area of device_offload_lock
On setsockopt path we need to hold device_offload_lock from the moment we check netdev is up until the context is fully ready to be added to the tls_device_list. No need to hold it around the get_netdev_for_sock(). Change the code and remove the confusing comment. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: John Hurley <john.hurley@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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