[asterisk-bugs] [Asterisk 0017479]: [patch] 3 way transfer - avoid deadlock

[Asterisk Bug Tracker]

The following issue requires your FEEDBACK. 
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https://issues.asterisk.org/view.php?id=17479 
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Reported By:                ddkprog
Assigned To:                
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Project:                    Asterisk
Issue ID:                   17479
Category:                   Channels/chan_mgcp
Reproducibility:            have not tried
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           SVN 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2010-06-07 02:49 CDT
Last Modified:              2010-06-09 10:28 CDT
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Summary:                    [patch] 3 way transfer - avoid deadlock
Description: 
history of this problem is
when the transfer of the channel chan_zap into the channel chan_mgcp
function attempt_transfer

/*******
       we have such comment inside it
static int attempt_transfer(struct mgcp_endpoint *p)
{
        /* *************************
         * I hope this works.
         * Copied out of chan_zap
         * Cross your fingers
         * *************************/
*************/

not taken into account that the channel chan_zap it fixed and undergo
changes.

as a result!
we are not synchronized function attempt_transfer in chan_mgcp with the
same function in the channel attempt_transfer in chan_zap(chan_dahdi)

patch fixes this problem!
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Relationships       ID      Summary
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related to          0002941 Previous locking improvements in chan_m...
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---------------------------------------------------------------------- 
 (0123187) lmadsen (administrator) - 2010-06-09 10:28
 https://issues.asterisk.org/view.php?id=17479#c123187 
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As mentioned in the other bug, you're using chan_zap.c which has not
existed for quite some time. We need to know that this is reproducible on
chan_dahdi.c 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2010-06-09 10:28 lmadsen        Note Added: 0123187                          
2010-06-09 10:28 lmadsen        Status                   new => feedback     
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