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Commit 7c1b18f8 authored by Russell Bryant's avatar Russell Bryant
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Merged revisions 81832 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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r81832 | russell | 2007-09-06 17:28:57 -0500 (Thu, 06 Sep 2007) | 16 lines

(closes issue #9724, closes issue #10374)
Reported by: kenw
Patches:
      9724.txt uploaded by russell (license 2)
Tested by: kenw, russell

Resolve a deadlock that occurs when doing a SIP transfer to parking.  

I come across this type of deadlock fairly often it seems.  It is very important
to mind the boundary between the channel driver and the core in respect to the
channel lock and the channel-pvt lock.  Channel drivers lock to lock the
pvt and then the channel once it calls into the core, while the core will do
it in the opposite order.  The way this is avoided is by having channel drivers
either release their pvt lock while calling into the core, or such as in this
case, unlocking the pvt just long enough to acquire the channel lock.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@81839 65c4cc65-6c06-0410-ace0-fbb531ad65f3
parent bde7d34c
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