linux-kernel - Re: [PATCH v6 4/4] Bluetooth: btusb: Use the cmd_timeout method to reset the Intel BT chip

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Date:   Fri, 25 Jan 2019 08:51:16 +0100
From:   Marcel Holtmann <marcel@...tmann.org>
To:     Rajat Jain <rajatja@...gle.com>
Cc:     Johan Hedberg <johan.hedberg@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "David S. Miller" <davem@...emloft.net>,
        Dmitry Torokhov <dtor@...omium.org>,
        Alex Hung <alex.hung@...onical.com>,
        linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, netdev@...r.kernel.org,
        rajatxjain@...il.com, dtor@...gle.com, raghuram.hegde@...el.com,
        chethan.tumkur.narayan@...el.com, sukumar.ghorai@...el.com
Subject: Re: [PATCH v6 4/4] Bluetooth: btusb: Use the cmd_timeout method to
 reset the Intel BT chip

Hi Rajat,

> If the platform provides it, use the reset gpio to reset the Intel BT
> chip, as part of cmd_timeout handling. This has been found helpful on
> Intel bluetooth controllers where the firmware gets stuck and the only
> way out is a hard reset pin provided by the platform.
> 
> Signed-off-by: Rajat Jain <rajatja@...gle.com>
> ---
> v6: Move the cmd_timeout() hook assignment with other hooks, move the
>    reset_gpio check in the timeout function.
> v5: Rename the hook to cmd_timeout, and wait for 5 timeouts before
>    resetting the device.
> v4: Use data->flags instead of clearing the quirk in btusb_hw_reset()
> v3: Better error handling for gpiod_get_optional()
> v2: Handle the EPROBE_DEFER case.
> 
> drivers/bluetooth/btusb.c | 54 +++++++++++++++++++++++++++++++++++++++
> 1 file changed, 54 insertions(+)

patch has been applied to bluetooth-next tree.

Regards

Marcel