tcm_fc: Resolve suspicious RCU usage warnings
Use rcu_dereference_protected to tell rcu that the ft_lport_lock is held during ft_lport_create. This resolved "suspicious RCU usage" warnings when debugging options are turned on. Signed-off-by: NMark Rustad <mark.d.rustad@intel.com> Tested-by: NRoss Brattain <ross.b.brattain@intel.com> Cc: <stable@vger.kernel.org> Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
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