From: Harvey Yang <harvey.huawei.yang@gmail.com>
Date: Tue, 22 Jan 2013 05:31:30 +0000 (+0800)
Subject: staging: usbip: use interrupt safe spinlock to avoid potential deadlock.
X-Git-Tag: v3.9-rc1~127^2~326
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dcf14779280215d1765141ce04c675df3e4301c5;p=pandora-kernel.git

staging: usbip: use interrupt safe spinlock to avoid potential deadlock.

The function 'usbip_event_add()' may be called in interrupt context on
the stub side:
'stub_complete'->'stub_enqueue_ret_unlink'->'usbip_event_add'.
In this function it tries to get the lock 'ud->lock', so we should
disable irq when we get this lock in process context.

Signed-off-by: Harvey Yang <harvey.huawei.yang@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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