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(-)