Hello Alan,
bisecting turned out to be much simpler than I was afraid of.
Here's the result:
638139eb95d2d241781330a321e88c8dafe46078 is the first bad commit
commit 638139eb95d2d241781330a321e88c8dafe46078
Author: Petr Mladek <pmladek@xxxxxxx>
Date: Fri Sep 19 17:32:24 2014 +0200
usb: hub: allow to process more usb hub events in parallel
It seems that only choose_devnum() was not ready to process more hub
events at the same time.
All should be fine if we take bus->usb_address0_mutex there. It will
make sure that more devnums will not be chosen for the given bus and
the related devices at the same time.
Signed-off-by: Petr Mladek <pmladek@xxxxxxx>
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
:040000 040000 6c3b464b8db2bec572cf7904c0aac317b41c1eec da3ee40957d0637f17895ae05aad4a6646377b2a M drivers
thanks and cheers,
Roland
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