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From: Marcel Holtmann <marcel@holtmann.org>
To: hongyi mao <maohongyicn@gmail.com>
Cc: Bluez mailing list <linux-bluetooth@vger.kernel.org>
Subject: Re: Kernel Bluetooth Protocol Stack Problem
Date: Tue, 8 Oct 2019 10:41:06 +0200	[thread overview]
Message-ID: <140A3914-6A0F-4E42-9858-7CDFE348C0CA@holtmann.org> (raw)
In-Reply-To: <CACokStdMboxnDPR6cdQYfpfdNApQCn73pjQZNqQ+ag0QPYZXgw@mail.gmail.com>

Hi Hongyi,

> Currently we have found a problem when using the kernel Bluetooth
> protocol stack.
> 
> Bluetooth hardware: support BR/BLE USB Client Module
> 
> Kernel version: 3.18.20
> 
> The problem: our host received the HCI_EV_CONN_REQUEST event, in this
> event call hci_conn_add () and create a struct hci_conn,
> then the host will send HCI_OP_ACCEPT_SYNC_CONN_REQ command in the
> event processing.
> However, according to the Bluetooth protocol core_v5.0 description,
> the host will then receive a Command Status event or Synchronous
> Connection Complete event or Connection Complete event for the link,
> which will include Connection_Handle and the link parameters if the
> setup is successful.
> However, the host did not receive these events for the link.
> Hdev->rx_work workqueue is still working to collect events.
> After a period of time, the host receives an HCI_EV_CHANNEL_SELECTED
> event, which is to operate the hci_conn->amp_mgr structure,
> but the host has not received any events containing any information
> in the structure, this structure has not been created, so the kernel
> appears oops
> 
> Thanks and Best Regards!

please create a binary trace with btmon -w trace.log and I can have a look at it. However if your BR/EDR/LE controllers sends AMP controller events, something is wrong with your controller.

Regards

Marcel


  reply	other threads:[~2019-10-08  8:41 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-08  8:34 Kernel Bluetooth Protocol Stack Problem hongyi mao
2019-10-08  8:41 ` Marcel Holtmann [this message]
     [not found]   ` <CACokStd_VLLP=dc+v=MZXpYF+Pw57f0Cma3-HSrXz5_PdiyRfw@mail.gmail.com>
2019-10-10  3:43     ` Marcel Holtmann
2019-10-10  8:27       ` hongyi mao
2019-10-16 19:08         ` Marcel Holtmann

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