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From:   Sherry Sun <sherry.sun@nxp.com>
To:     Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
CC:     "linux-bluetooth@vger.kernel.org" <linux-bluetooth@vger.kernel.org>,
        "marcel@holtmann.org" <marcel@holtmann.org>,
        "johan.hedberg@gmail.com" <johan.hedberg@gmail.com>
Subject: BT large file transfer failed when do suspend/resume test 
Thread-Topic: BT large file transfer failed when do suspend/resume test 
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Date:   Wed, 6 Jan 2021 13:40:23 +0000
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Hi Abhishek,

I want to ask you some questions about your patch: Bluetooth: Handle BR/EDR=
 devices during suspend. (https://patchwork.kernel.org/project/bluetooth/pa=
tch/20200311085359.RFC.v6.2.Icc7c35e1cabf10f8a383a009694987520f1d1b35@chang=
eid/)

Platform: L5.10 + Bluez5.55 + Marvell BT chip

Background: Our test team usually try suspend/resume test when transferring=
 large file through BT, to see if the file transfer can be continued after =
suspend/resume. It can works well before L5.10
But we found on L5.10, the BT connection lost if we try to suspend/resume, =
so the file transfer(through OBEX Object Push) shows failed. Then we found =
your patches when debugging.

Questions:
1. Before L5.10, kernel always keep BT connected during suspend/resume. So =
why we need to disconnect all the BT devices when system suspend now?
2. I found that the device been disconnected due to suspend won't been auto=
-connected after resume, shouldn't we get the BT device auto-connected afte=
r resume like wifi devices done?
3. For the large file transfer, if the BT been disconnected during suspend,=
 the transfer will fail, do we have any methods to avoid this issue?

I'm new to Bluetooth, there are many things I don't understand, looking for=
ward to your answer, and thanks for now!

Best regards
Sherry sun