[ewg] 1.5.4 pull request

[Mike Marciniszyn]

Vlad,

Please pull the following patches from
git.openfabrics.org/~mmarciniszyn/scm/linux-2.6.to_ofed.

Thanks!
Mike

commit 5f675786d95583277d58d691464eede03c7ae8f0
Author: Ram Vepa <ram.vepa at qlogic.com>
Date:   Mon Jul 25 12:49:09 2011 -0400

    IB/qib: Fix potential deadlock with link down interrupt

    There is a possibility of a deadlock due to the way locks are acquired and
    released in qib_set_uevent_bits(). The function qib_set_uevent_bits() is cal
    in process context calling spin_lock() and spin_unlock() while this same loc
    is acquired/released in interrupt context which can lead to a deadlock when
    running on the same cpu.

    The fix is to replace spin_lock() and spin_unlock() with spin_lock_irqsave()
    and spin_unlock_irqrestore() respectively in qib_set_uevent_bits().

    Signed-off-by: Ram Vepa <ram.vepa at qlogic.com>
    Signed-off-by: Mike Marciniszyn <mike.marciniszyn at qlogic.com>

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