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 4.4-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-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fd865802c66bc451dc515ed89360f84376ce1a56 Mon Sep 17 00:00:00 2001
From: Leif Liddy <leif.linux@xxxxxxxxx>
Date: Sat, 8 Jul 2017 20:55:32 +0200
Subject: Bluetooth: btusb: fix QCA Rome suspend/resume
From: Leif Liddy <leif.linux@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
Cc: Kai Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/bluetooth/btusb.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2969,6 +2969,12 @@ 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@xxxxxxxxx are
queue-4.4/bluetooth-btusb-fix-qca-rome-suspend-resume.patch