linux-kernel - Re: [PATCH] Bluetooth: Skip the shutdown routine if the interface is not up

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Message-Id: <C0DF74E2-3705-42A4-898D-3E89C8C95D4A@holtmann.org>
Date:	Sun, 26 Apr 2015 21:49:06 -0700
From:	Marcel Holtmann <marcel@...tmann.org>
To:	Gabriele Mazzotta <gabriele.mzt@...il.com>
Cc:	"An, Tedd" <tedd.an@...el.com>,
	"Gustavo F. Padovan" <gustavo@...ovan.org>,
	Johan Hedberg <johan.hedberg@...il.com>,
	linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Bluetooth: Skip the shutdown routine if the interface is not up

Hi Gabriele,

> Most likely, the shutdown routine requires the interface to be up.
> This is the case for BTUSB_INTEL: the routine tries to send a command
> to the interface, but since this one is down, it fails and exits once
> HCI_INIT_TIMEOUT has expired.
> 
> Signed-off-by: Gabriele Mazzotta <gabriele.mzt@...il.com>
> ---
> net/bluetooth/hci_core.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
> index 476709b..4663c3d 100644
> --- a/net/bluetooth/hci_core.c
> +++ b/net/bluetooth/hci_core.c
> @@ -1557,7 +1557,8 @@ static int hci_dev_do_close(struct hci_dev *hdev)
> {
> 	BT_DBG("%s %p", hdev->name, hdev);
> 
> -	if (!hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
> +	if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
> +	    test_bit(HCI_UP, &hdev->flags)) {
> 		/* Execute vendor specific shutdown routine */
> 		if (hdev->shutdown)
> 			hdev->shutdown(hdev);

this is a good catch.

Acked-by: Marcel Holtmann <marcel@...tmann.org>
Cc: stable@...r.kernel.org # 4.0.x

Dave, do you want to take this patch straight into your stable tree?

Regards

Marcel

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