From: Roland Dreier <rolandd@cisco.com>
Date: Tue, 12 Feb 2008 22:38:27 +0000 (-0800)
Subject: IB/cm: Fix infiniband_cm class kobject ref counting
X-Git-Tag: v2.6.25-rc2~8^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c7a9bccd2ba9f17e4b588461f140578a0a7b073;p=pandora-kernel.git

IB/cm: Fix infiniband_cm class kobject ref counting

Commit 9af57b7a ("IB/cm: Add basic performance counters") introduced a
bug in how the reference count for cm_class.subsys.kobj was handled:
the path that released a device did a kobject_put() on that kobject, but
there was no kobject_get() in the path the handles adding a device.  So
the reference count ended up too low, which leads to bad things.  Fix up
and simplify the reference counting to avoid this.

(Actually, I introduced the bug when fixing the patch up to match some
of Greg's kobject changes, but who's counting)

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