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  1. Bug #1485057
  2. Comment #7

Comment 7 for bug 1485057

Revision history for this message
Roland Weber (r-o-l) wrote : Re: "lsusb -v" as root freezes the kernel on Acer ES1-111

As requested on the linux-usb mailing list, I've bisected the problem in the mainline git repository.

638139eb95d2d241781330a321e88c8dafe46078 is the first bad commit
commit 638139eb95d2d241781330a321e88c8dafe46078
Author: Petr Mladek <email address hidden>
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 <email address hidden>
    Acked-by: Alan Stern <email address hidden>
    Signed-off-by: Greg Kroah-Hartman <email address hidden>

:040000 040000 6c3b464b8db2bec572cf7904c0aac317b41c1eec da3ee40957d0637f17895ae05aad4a6646377b2a M drivers