Bluetooth: btusb: Only check needs_reset_resume DMI table for QCA rome chipsets
authorHans de Goede <hdegoede@redhat.com>
Fri, 27 Apr 2018 09:26:43 +0000 (11:26 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 16 May 2018 08:10:30 +0000 (10:10 +0200)
commit4aa9ef8a29ad2f26ebff93ca9a410d59b243a63d
tree4099721591034c4b054f562e77f42ef9b7d17345
parent4fcd0333b21e44e48c110a454b0baf696cbfc326
Bluetooth: btusb: Only check needs_reset_resume DMI table for QCA rome chipsets

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@vger.kernel.org
Cc: Jeremy Cline <jcline@redhat.com>
Suggested-by: Jeremy Cline <jcline@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/bluetooth/btusb.c