From: Marcel Holtmann <marcel@holtmann.org>
To: Nick Pelly <npelly@google.com>
Cc: linux-bluetooth@vger.kernel.org
Subject: Re: l2ping only works for 10 seconds with 2.6.27
Date: Wed, 26 Nov 2008 06:00:38 +0100 [thread overview]
Message-ID: <EC7BE40B-98DD-40A8-BAD8-756C6D998AF2@holtmann.org> (raw)
In-Reply-To: <35c90d960811251738pc7d0135hada76dfa4d3c67f7@mail.gmail.com>
Hi Nick,
> I have noticed with 2.6.27 that a bluez receiving side of l2ping will
> detch the ACL connection (preventing further l2cap echos) after 10
> seconds. HCI log below.
>
> Is this by design, or was it unintentional?
it is not fully intentional, but it result due the fact on how we had
to implement the Simple Pairing support. Problem here is that l2ping
can not create a remote reference count of the connection. So BlueZ
will clean up the ACL link. And we do have to do that since otherwise
we waste power with an unused link.
So if you do l2test -P 1 -n <bdaddr> first and then l2ping you will
see that the ACL link stays up since the l2test hold a remote
reference count.
Regards
Marcel
next prev parent reply other threads:[~2008-11-26 5:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-26 1:38 l2ping only works for 10 seconds with 2.6.27 Nick Pelly
2008-11-26 5:00 ` Marcel Holtmann [this message]
2008-11-26 7:52 ` Nick Pelly
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