From: David Goulet <dgoulet@efficios.com>
Date: Fri, 7 Dec 2012 17:05:24 +0000 (-0500)
Subject: Fix: check ht_del ret value of ust app session
X-Git-Url: http://git.efficios.com/?a=commitdiff_plain;h=c4a1715b6c7b500eac97e149b3994a877f3023bb;hp=c4a1715b6c7b500eac97e149b3994a877f3023bb;p=lttng-tools.git

Fix: check ht_del ret value of ust app session

UST app sesion can be destroyed by two execution paths. Either the app
unregisters or a destroy session is triggered. So, allowing a ht_del to
fail means that the session is already scheduled for teardown in a rcu
call.

Furthermore, this means that when looking up for a ust app session that
is not found becomes valid since it means it is in the teardown process.

Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
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