tree 5e47fe019fb7961883b3104a043eff71392c0ff2
parent e59a41b69a8e116d5ac8c95c4222f5a971f66bbd
author Sebastian Andrzej Siewior <bigeasy@linutronix.de> 1326201418 +0100
committer Nicholas Bellinger <nab@linux-iscsi.org> 1326875439 +0000

target: use save/restore lock primitive in core_dec_lacl_count()

It may happen that uasp will free the request in irq conntext, the
callchain:

 uasp_cmd_release() -> transport_generic_free_cmd() -> core_dec_lacl_count()

where the last function enables the IRQ. Those irqs are re-disabled
later (due to the spin.*irq_restore) but in between we could get hurt.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>