tree c2721898c3db66f743639a8446d72c48ebd11950
parent 0e3c8c26c7013b9d34929857598fd86ff1c22a6c
author Eugeny S. Mints <emints@ru.mvista.com> 1157194759 -0700
committer Greg Kroah-Hartman <gregkh@suse.de> 1159383536 -0700

USB: usb serial gadget smp related bug

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>