From: Greg KH <gregkh@linuxfoundation.org>
To: Salah Triki <salah.triki@gmail.com>
Cc: Marcel Holtmann <marcel@holtmann.org>,
Johan Hedberg <johan.hedberg@gmail.com>,
Luiz Augusto von Dentz <luiz.dentz@gmail.com>,
linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] usb: bluetooth: get lock before calling usb_[disable|enable]_autosuspend()
Date: Tue, 3 Aug 2021 07:37:57 +0200 [thread overview]
Message-ID: <YQjWNUgFWU2UO0RR@kroah.com> (raw)
In-Reply-To: <20210802221429.GA1370657@pc>
On Mon, Aug 02, 2021 at 11:14:29PM +0100, Salah Triki wrote:
> Based on the documentation of usb_[disable|enable]_autosuspend(), the
> caller must hold udev's device lock.
>
> Signed-off-by: Salah Triki <salah.triki@gmail.com>
> ---
> drivers/bluetooth/btusb.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
> index a9855a2dd561..2ceb48164b6d 100644
> --- a/drivers/bluetooth/btusb.c
> +++ b/drivers/bluetooth/btusb.c
> @@ -1939,8 +1939,11 @@ static int btusb_setup_csr(struct hci_dev *hdev)
>
> device_set_wakeup_capable(&data->udev->dev, false);
> /* Re-enable autosuspend if this was requested */
> - if (enable_autosuspend)
> + if (enable_autosuspend) {
> + usb_lock_device(data->udev);
> usb_enable_autosuspend(data->udev);
> + usb_unlock_device(data->udev);
> + }
> }
> }
>
> --
> 2.25.1
>
As was pointed out elsewhere, this is not correct.
thanks,
greg k-h
prev parent reply other threads:[~2021-08-03 5:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-02 22:14 [PATCH] usb: bluetooth: get lock before calling usb_[disable|enable]_autosuspend() Salah Triki
2021-08-03 5:37 ` Greg KH [this message]
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