[PATCH 0/5] DRM device-alloc cleanup

[David Herrmann]

Hi

This cleans up the bus drivers in DRM. Instead of copying the device alloc/free
semantics into each bus driver (drm_{pci,platform,usb}.c) we now have a central
place in drm_stub.c.

This introduces drm_dev_{alloc,free,register,unregister}(). They have the same
semantics as most other kernel subsystems. *_alloc() allocates a new device and
populates the static fields and sub-objects. *_free() frees an unregistered
object allocated via *_alloc(). *_register() registers a DRM device and
*_unregister() obviously unregisters a DRM device. A *_free() is still needed
after calling *_unregister() (same as for "struct device"). No ref-counting is
added as it is not required by any driver.

Note that the bus drivers are modified to use the new helpers directly. However,
I didn't modify the drivers to use *_unregister() and *_free() directly.
Instead, the drm_put_dev() helper was modified to use these. Reason for that is
that I have pending patches to make device hotplugging safer regarding mmaps.
But these aren't ready, yet. Hopefully I can get them ready for rc5 or rc6.

Tested on nouveau.

David

David Herrmann (5):
  drm: add drm_dev_alloc() helper
  drm: merge device setup into drm_dev_register()
  drm: move drm_lastclose() to drm_fops.c
  drm: introduce drm_dev_free() to fix error paths
  drm: move device unregistration into drm_dev_unregister()

 drivers/gpu/drm/drm_drv.c      |  70 ----------
 drivers/gpu/drm/drm_fops.c     |  70 ++++++++++
 drivers/gpu/drm/drm_pci.c      |  62 ++-------
 drivers/gpu/drm/drm_platform.c |  59 +-------
 drivers/gpu/drm/drm_stub.c     | 310 ++++++++++++++++++++++++++++-------------
 drivers/gpu/drm/drm_usb.c      |  57 +-------
 include/drm/drmP.h             |   8 +-
 7 files changed, 308 insertions(+), 328 deletions(-)

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1.8.4