tree 326282263d7ef47c18e02fee77ffd586457c69e8
parent 39b945a37bac2b692773a470890c8ba301485b15
author David Brownell <dbrownell@users.sourceforge.net> 1212731150 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1212776948 -0700

spi: fix refcount-related spidev oops-on-rmmod

This addresses other oopsing paths in "spidev" by changing how it manages
refcounting.  It decouples the lifecycle of the per-device data from the
class device (not just the spi device):

  - Use class_{create,destroy} not class_{register,unregister}.
  - Use device_{create,destroy} not device_{register,unregister}.
  - Free the per-device data only when TWO conditions are true:
      * Driver is unbound from underlying SPI device, and
      * Device is no longer open (new)

Also, spi_{get,set}_drvdata not dev_{get,set}_drvdata for simpler code.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Sebastian Siewior <bigeasy@tglx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>