staging: vt6656: return from workqueues on fMP_DISCONNECTED
Return from work queues on flag fMP_DISCONNECTED to prevent any scheduling threads past closing of device. Signed-off-by: NMalcolm Priestley <tvboxspy@gmail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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