On Tue, May 15, 2018 at 10:07:02AM -0700, Brian Norris wrote: > + Guenter > > On Mon, May 14, 2018 at 08:49:05AM +0200, Greg Kroah-Hartman wrote: > > 4.14-stable review patch. If anyone has any objections, please let me know. > > FYI, this backport is wrong. See below. > > > ------------------ > > > > From: Hans de Goede <hdegoede@xxxxxxxxxx> > > > > commit fc54910280eb38bde923cdf0898e74687d8e6989 upstream. > > > > Jeremy Cline correctly points out in rhbz#1514836 that a device where the > > QCA rome chipset needs the USB_QUIRK_RESET_RESUME quirk, may also ship > > with a different wifi/bt chipset in some configurations. > > > > If that is the case then we are needlessly penalizing those other chipsets > > with a reset-resume quirk, typically causing 0.4W extra power use because > > this disables runtime-pm. > > > > This commit moves the DMI table check to a btusb_check_needs_reset_resume() > > helper (so that we can easily also call it for other chipsets) and calls > > this new helper only for QCA_ROME chipsets for now. > > > > BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1514836 > > Cc: stable@xxxxxxxxxxxxxxx > > Cc: Jeremy Cline <jcline@xxxxxxxxxx> > > Suggested-by: Jeremy Cline <jcline@xxxxxxxxxx> > > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> > > Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx> > > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > > --- > > drivers/bluetooth/btusb.c | 10 +++++++--- > > 1 file changed, 7 insertions(+), 3 deletions(-) > > > > --- a/drivers/bluetooth/btusb.c > > +++ b/drivers/bluetooth/btusb.c > > @@ -2902,6 +2902,12 @@ static int btusb_config_oob_wake(struct > > } > > #endif > > > > +static void btusb_check_needs_reset_resume(struct usb_interface *intf) > > +{ > > + if (dmi_check_system(btusb_needs_reset_resume_table)) > > + interface_to_usbdev(intf)->quirks |= USB_QUIRK_RESET_RESUME; > > +} > > + > > static int btusb_probe(struct usb_interface *intf, > > const struct usb_device_id *id) > > { > > @@ -3037,9 +3043,6 @@ static int btusb_probe(struct usb_interf > > hdev->send = btusb_send_frame; > > hdev->notify = btusb_notify; > > > > - if (dmi_check_system(btusb_needs_reset_resume_table)) > > - interface_to_usbdev(intf)->quirks |= USB_QUIRK_RESET_RESUME; > > - > > #ifdef CONFIG_PM > > err = btusb_config_oob_wake(hdev); > > if (err) > > @@ -3177,6 +3180,7 @@ static int btusb_probe(struct usb_interf > > hdev->setup = btusb_setup_csr; > > > > set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks); > > + btusb_check_needs_reset_resume(intf); > > The original code puts this under the BTUSB_QCA_ROME section, but this > is getting placed under the BTUSB_CSR section. > Turns out 4.16.y has the same problem. Maybe git got confused because mainline also has set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks); in the BTUSB_QCA_ROME section. This is missing in 4.14.y and 4.16.y. Guenter
