xen/evtchn: don't do unbind_from_irqhandler under spinlock

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unbind_from_irqhandler can end up doing /proc operations, which can't
happen under a spinlock.  So before removing the IRQ handler,
disable the irq under the port_user lock (masking the underlying event
channel and making sure the irq handler isn't running concurrently and
won't start running), then remove the handler without the lock.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

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Jeremy Fitzhardinge 2010-05-28 15:28:27 -07:00

parent 1a1a17cddb

commit 3f5e554f66

1 changed files with 11 additions and 2 deletions

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drivers/xen/evtchn.c

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