[PATCHv3 0/5] usb/gadget: independent registration of gadgets and gadget drivers

[Ruslan Bilovol]

This patchset adds independent registration of gadgets
and gadget drivers to udc-core. This is very useful for
built-in modules into kernel case since it's possible
situation that gadget driver is probing at a time
when no gadgets are registered in udc-core.
In this case instead of silently failing without
of any attempt to recover, with independent registration
of gadgets and gadget drivers there is no matter
in which order gadgets and gadget drivers are
probed/registered.

This patch has side-effect on gadget drivers that had
__init/__exit attributes on some paths like bind/unbind
and (since bind/unbind may happen at any time) should
not use them now. This is covered by forth patch

=====================
v3:
 - addressed Alan's comments - now UDC name and pending
   gadget drivers list is a part of struct usb_gadget_driver.
 - removed usb_udc_attach_driver() function that became unused
   and not needed now

v2:
 - changed first patch to have only deferred probe part
   (because Gadget Bus seems to be better variant when
   some more complicated behavior will be required)
 - rebased to latest 'next' branch of Felipe Balbi's tree


Ruslan Bilovol (5):
  usb: gadget: bind UDC by name passed via usb_gadget_driver structure
  usb: gadge: configfs: pass UDC name via usb_gadget_driver struct
  usb: gadget: udc-core: remove unused usb_udc_attach_driver()
  usb: gadget: legacy: don't use __init/__exit attributes for
    bind/unbind path
  usb: gadget: udc-core: independent registration of gadgets and gadget
    drivers

 drivers/usb/gadget/configfs.c            | 27 +++++-----
 drivers/usb/gadget/legacy/acm_ms.c       |  6 +--
 drivers/usb/gadget/legacy/audio.c        |  6 +--
 drivers/usb/gadget/legacy/cdc2.c         |  6 +--
 drivers/usb/gadget/legacy/dbgp.c         |  2 +-
 drivers/usb/gadget/legacy/ether.c        |  8 +--
 drivers/usb/gadget/legacy/gmidi.c        |  6 +--
 drivers/usb/gadget/legacy/hid.c          |  6 +--
 drivers/usb/gadget/legacy/mass_storage.c |  4 +-
 drivers/usb/gadget/legacy/multi.c        | 16 +++---
 drivers/usb/gadget/legacy/ncm.c          |  6 +--
 drivers/usb/gadget/legacy/nokia.c        |  6 +--
 drivers/usb/gadget/legacy/printer.c      |  6 +--
 drivers/usb/gadget/legacy/serial.c       |  2 +-
 drivers/usb/gadget/legacy/webcam.c       |  4 +-
 drivers/usb/gadget/legacy/zero.c         |  2 +-
 drivers/usb/gadget/udc/udc-core.c        | 88 +++++++++++++++++++-------------
 include/linux/usb/gadget.h               |  8 ++-
 18 files changed, 116 insertions(+), 93 deletions(-)

-- 
1.9.1

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