On some machines, it seems that usb hubs do not get power while
being suspended. We can get something like this in dmesg:
     usb usb2: root hub lost power or was reset

When this is the case, .reset_resume is called instead of .resume.
If .reset_resume is not set, bluetooth modules would stay in an unusable
state because the resume function is not called.

Signed-off-by: Wen-chien Jesse Sung <jesse.sung@canonical.com>
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  drivers/bluetooth/btusb.c |    1 +
  1 files changed, 1 insertions(+), 0 deletions(-)