This is a note to let you know that I've just added the patch titled

Bluetooth: btusb: fix QCA Rome suspend/resume

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: bluetooth-btusb-fix-qca-rome-suspend-resume.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From fd865802c66bc451dc515ed89360f84376ce1a56 Mon Sep 17 00:00:00 2001

From: Leif Liddy leif.linux@gmail.com Date: Sat, 8 Jul 2017 20:55:32 +0200 Subject: Bluetooth: btusb: fix QCA Rome suspend/resume

From: Leif Liddy leif.linux@gmail.com

commit fd865802c66bc451dc515ed89360f84376ce1a56 upstream.

There's been numerous reported instances where BTUSB_QCA_ROME bluetooth controllers stop functioning upon resume from suspend. These devices seem to be losing power during suspend. Patch will detect a status change on resume and perform a reset.

Signed-off-by: Leif Liddy leif.linux@gmail.com Signed-off-by: Marcel Holtmann marcel@holtmann.org Cc: Kai Heng Feng kai.heng.feng@canonical.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/bluetooth/btusb.c | 6 ++++++ 1 file changed, 6 insertions(+)

--- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2925,6 +2925,12 @@ static int btusb_probe(struct usb_interf if (id->driver_info & BTUSB_QCA_ROME) { data->setup_on_usb = btusb_setup_qca; hdev->set_bdaddr = btusb_set_bdaddr_ath3012; + + /* QCA Rome devices lose their updated firmware over suspend, + * but the USB hub doesn't notice any status change. + * Explicitly request a device reset on resume. + */ + set_bit(BTUSB_RESET_RESUME, &data->flags); }

#ifdef CONFIG_BT_HCIBTUSB_RTL

Patches currently in stable-queue which might be from leif.linux@gmail.com are

queue-4.9/bluetooth-btusb-fix-qca-rome-suspend-resume.patch