From: Roland Dreier <rolandd@cisco.com>
Date: Thu, 10 Nov 2005 18:18:23 +0000 (-0800)
Subject: [IB] umad: further ib_unregister_mad_agent() deadlock fixes
X-Git-Tag: v2.6.15-rc1~45^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=94382f3562e350ed7c8f7dcd6fc968bdece31328;p=pandora-kernel.git

[IB] umad: further ib_unregister_mad_agent() deadlock fixes

The previous umad deadlock fix left ib_umad_kill_port() still
vulnerable to deadlocking.  This patch fixes that by downgrading our
lock to a read lock when we might end up trying to reacquire the lock
for reading.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
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