linux-kernel - Re: [PATCH v4 2/3] Bluetooth: hci_qca: Retry btsoc initialize when it fails

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Message-Id: <A15FDE9C-21ED-461A-8884-C93E596DF45A@holtmann.org>
Date:   Wed, 15 Jan 2020 22:37:11 +0100
From:   Marcel Holtmann <marcel@...tmann.org>
To:     Rocky Liao <rjliao@...eaurora.org>
Cc:     Johan Hedberg <johan.hedberg@...il.com>, mka@...omium.org,
        linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, bgodavar@...eaurora.org,
        hemantg@...eaurora.org
Subject: Re: [PATCH v4 2/3] Bluetooth: hci_qca: Retry btsoc initialize when it
 fails

Hi Rocky,

> This patch adds the retry of btsoc initialization when it fails. There are
> reports that the btsoc initialization may fail on some platforms but the
> repro ratio is very low. The symptoms is the firmware downloading failed
> due to the UART write timed out. The failure may be caused by UART,
> platform HW or the btsoc itself but it's very difficlut to root cause,
> given the repro ratio is very low. Add a retry for the btsoc initialization
> can work around most of the failures and make Bluetooth finally works.
> 
> Signed-off-by: Rocky Liao <rjliao@...eaurora.org>
> ---
> 
> Changes in v2: None
> Changes in v3: None
> Changes in v4:
>  -rebased the patch with latet code
>  -refined macro and variable name
>  -updated commit message
> 
> drivers/bluetooth/hci_qca.c | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)

patch has been applied to bluetooth-next tree.

Regards

Marcel