Comment 18 for bug 1757218

This is insane. I have reset that bisect and tried again using "fixed" and "broken" instead of "new" and "old" and, again, the bisect had the following:

1fdb926974695d3dbc05a429bafa266fdd16510e is the first fixed commit
commit 1fdb926974695d3dbc05a429bafa266fdd16510e
Author: Hans de Goede <email address hidden>
Date: Tue Feb 20 09:06:18 2018 +0100

    Bluetooth: btusb: Use DMI matching for QCA reset_resume quirking

    Commit 61f5acea8737 ("Bluetooth: btusb: Restore QCA Rome suspend/resume fix
    with a "rewritten" version") applied the USB_QUIRK_RESET_RESUME to all QCA
    USB Bluetooth modules. But it turns out that the resume problems are not
    caused by the QCA Rome chipset, on most platforms it resumes fine. The
    resume problems are actually a platform problem (likely the platform
    cutting all power when suspended).

    The USB_QUIRK_RESET_RESUME quirk also disables runtime suspend, so by
    matching on usb-ids, we're causing all boards with these chips to use extra
    power, to fix resume problems which only happen on some boards.

    This commit fixes this by applying the quirk based on DMI matching instead
    of on usb-ids, so that we match the platform and not the chipset.

    Here is the /sys/kernel/debug/usb/devices for the Bluetooth module:

    T: Bus=01 Lev=01 Prnt=01 Port=07 Cnt=04 Dev#= 5 Spd=12 MxCh= 0
    D: Ver= 2.01 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
    P: Vendor=0cf3 ProdID=e300 Rev= 0.01
    C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA
    I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms
    E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
    E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
    I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms
    E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms
    I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms
    E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms
    I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms
    E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms
    I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms
    E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms
    I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms
    E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms
    I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms
    E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms

    BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1514836
    Fixes: 61f5acea8737 ("Bluetooth: btusb: Restore QCA Rome suspend/resume..")
    Cc: <email address hidden>
    Cc: Brian Norris <email address hidden>
    Cc: Kai-Heng Feng <email address hidden>
    Reported-and-tested-by: Kevin Fenzi <email address hidden>
    Signed-off-by: Hans de Goede <email address hidden>
    Signed-off-by: Marcel Holtmann <email address hidden>

:040000 040000 2930a43c59c0e767763843528fa8526d4e17b764 626944fe592accb35e33c69be141dbcee910910c M drivers