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Bluetooth: btusb: fix QCA Rome suspend/resume

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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>
This commit is contained in:
Leif Liddy 2017-07-08 20:55:32 +02:00 committed by Greg Kroah-Hartman
parent 977784638f
commit ec4f8a71c0
1 changed files with 6 additions and 0 deletions
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6
drivers/bluetooth/btusb.c
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@ -2969,6 +2969,12 @@ static int btusb_probe(struct usb_interface *intf,
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