i40iw: Receive notification events correctly
Device notifications are not received after the first interface is closed; since there is an unregister for notifications on every interface close. Correct this by unregistering for device notifications only when the last interface is closed. Also, make all operations on the i40iw_notifiers_registered atomic as it can be read/modified concurrently. Fixes: 8e06af71 ("i40iw: add main, hdr, status") Signed-off-by: NMustafa Ismail <mustafa.ismail@intel.com> Signed-off-by: NShiraz Saleem <shiraz.saleem@intel.com> Signed-off-by: NDoug Ledford <dledford@redhat.com>
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