Public bug reported:

1) Ubuntu release
  Ubuntu 16.04.2 LTS x86_64 desktop
2) package name
linux-generic-hwe-16.04 (4.8.0.36.8)

3) Expected behavior
When I attached more than 3 uas devices, all uas devices would be probed as 
SCSI disks.

4) What happened instead
The third device failed to be attached, and the first and second devices made 
strange behaviors.

5) Additional information
When I used linux-generic (4.4.0.62.65), it was good.
I found this bug on Fedora 25 at first, and I confirmed the same bug exists on 
Ubuntu 16.04 LTS.
  https://bugzilla.redhat.com/show_bug.cgi?id=1420935

** Affects: linux-hwe (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: fedora
     Importance: Unknown
         Status: Unknown


** Tags: kernel-bug

** Bug watch added: Red Hat Bugzilla #1420935
   https://bugzilla.redhat.com/show_bug.cgi?id=1420935

** Also affects: fedora via
   https://bugzilla.redhat.com/show_bug.cgi?id=1420935
   Importance: Unknown
       Status: Unknown

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https://bugs.launchpad.net/bugs/1666109

Title:
  failed to attach more than 3 uas devices on 16.04 LTS HWE kernel

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