[PATCH v2 0/4] USB: cdc-acm: handle broken union descriptors

[Johan Hovold <johan@kernel.org>]

This series adds support for handling broken union descriptors by
falling back to "combined-interface" probing.

The first patch drops some bogus altsetting sanity checks which would
otherwise have had to be needlessly reproduced for consistency. The
third patch drops the driver specific data class define in favour of the
common one. The last one, cleans up the no-union-descriptor handling by
probing for a "combined-interface" before falling back to the
call-management descriptor.

Note that I changed my mind on the stable tag; we can't be overly
paranoid about a theoretical risk of breaking some quirky devices. And
if we do, we still want to know about it, right?

Daniel, would you mind giving these a spin as well?

Johan

v2
 - add stable tag to 2/2 as it enables a new class of devices
 - demote a broken-union warning to dev_dbg
 - replace the fourth RFC patch with a clean up of the
   no-union-descriptor case only


Johan Hovold (4):
  Revert "cdc-acm: hardening against malicious devices"
  USB: cdc-acm: handle broken union descriptors
  USB: cdc-acm: use common data-class define
  USB: cdc-acm: clean up no-union-descriptor handling

 drivers/usb/class/cdc-acm.c | 55 ++++++++++++++++---------------------
 drivers/usb/class/cdc-acm.h | 13 ++++-----
 2 files changed, 29 insertions(+), 39 deletions(-)

-- 
2.26.2