linux-kernel - Re: [RFC PATCH v1] Bluetooth: hci_qca: Collect controller memory dump during SSR

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Date:   Sat, 4 Jan 2020 10:47:58 +0100
From:   Marcel Holtmann <marcel@...tmann.org>
To:     Balakrishna Godavarthi <bgodavar@...eaurora.org>
Cc:     Johan Hedberg <johan.hedberg@...il.com>,
        Matthias Kaehlcke <mka@...omium.org>,
        lkml <linux-kernel@...r.kernel.org>,
        BlueZ devel list <linux-bluetooth@...r.kernel.org>,
        Hemantg <hemantg@...eaurora.org>,
        MSM <linux-arm-msm@...r.kernel.org>,
        Claire Chang <tientzu@...omium.org>, seanpaul@...omium.org,
        Rocky Liao <rjliao@...eaurora.org>,
        Yoni Shavit <yshavit@...gle.com>,
        Venkata Lakshmi Narayana Gubba <gubbaven@...eaurora.org>
Subject: Re: [RFC PATCH v1] Bluetooth: hci_qca: Collect controller memory dump
 during SSR

Hi Balakrishna,

> We will collect the ramdump of BT controller when hardware error event
> received before rebooting the HCI layer. Before restarting a subsystem
> or a process running on a subsystem, it is often required to request
> either a subsystem or a process to perform proper cache dump and
> software failure reason into a memory buffer which application
> processor can retrieve afterwards. SW developers can often provide
> initial investigation by looking into that debugging information.
> 
> Signed-off-by: Balakrishna Godavarthi <bgodavar@...eaurora.org>
> Signed-off-by: Venkata Lakshmi Narayana Gubba <gubbaven@...eaurora.org>
> ---
> drivers/bluetooth/hci_qca.c | 296 +++++++++++++++++++++++++++++++++++-
> 1 file changed, 291 insertions(+), 5 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel