This patch fixes the long standing schedule with interrupts off problem
of the uss720 driver. The problem is caused by the parport layer calling
the save and restore methods within a write_lock_irqsave guarded region.
The fix is to issue the control transaction requests required by save
and restore asynchronously.
Signed-off-by: NThomas Sailer, <sailer@ife.ee.ethz.ch>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>