net: irda: hang when doing anything to a socket in accept()

[Sasha Levin]

Hi all,

I've noticed that once an IRDA socket is in accept(), any further action that 
requires locking the
socket will result in a hang until accept() is completed (which may take a 
while). After a while
hung task spew is printed out.

                thread 1                |               thread 2
                                        |
        listen(sock)                    |       
                bind(sock)              |
                        accept(sock)    |
                                        |       setsockopt(sock)
                                                *HANG*  

I'm not sure I can provide a properly tested fix since I don't actually have 
IRDA hardware to test
on.


Thanks,
Sasha
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