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Adjust dev->dev_lock spinlock lock/unlock calls to be safe for SMP case.
Otherwise the following sequence may lead to a deadlock in SMP case:
gs_send()->usb_ep_queue()
->(in case a request is satisfied immediatly) gs_write_complete()
for ex for pxa2xx_udc.c:
usb_ep_queue()->pxa2xx_ep_queue()->write_fifo()->done()->gs_write_complete()
(through req.complete pointer)
Signed-off-by: Eugeny S. Mints <emints@ru.mvista.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
80f8af0c59