From: Leif Liddy Date: Sat, 8 Jul 2017 18:55:32 +0000 (+0200) Subject: Bluetooth: btusb: fix QCA Rome suspend/resume X-Git-Tag: v4.13.15~25 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1cad93dbb3f1d2db13bc10c448624381f5e4a1cb;p=thirdparty%2Fkernel%2Fstable.git Bluetooth: btusb: fix QCA Rome suspend/resume 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 Signed-off-by: Marcel Holtmann Cc: Kai Heng Feng Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index e331e212f5fcd..99c97f65149e2 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -3068,6 +3068,12 @@ 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