Patch "Bluetooth: btusb: fix QCA Rome suspend/resume" has been added to the 4.9-stable tree

Patch "Bluetooth: btusb: fix QCA Rome suspend/resume" has been added to the 4.9-stable tree

[gregkh]

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;a=summary

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