On Wed, Dec 19, 2018 at 05:48:16PM +0100, Wolfram Sang wrote:

Finally, here is the implementation Hans and I agreed on. Plus, all potential
users I could spot already converted. Renesas R-Car driver was added on top.
This series was tested on a Renesas Lager board (R-Car H2). I had to hack some
error cases into the code to verify the workings. Thanks for all the tests so
far. Of course, more testing never hurts ;)

Please comment, review, test... a branch can be found here:

git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git renesas/i2c/core-pm-helpers

Thanks,

   Wolfram

Changes since RFC:

* don't use bitfields anymore but an unsigned long flags variable which is only
  meant for flags to be changed when the adapter lock is held

* split the genereic accessor into _mark_suspended() and _mark_resumed()

* added kerneldoc and noted that using these helpers is optional

* documented -ESHUTDOWN as the error code when trying to transfer using an
  already suspended adapter

* added acks from last series. Changes were minor enough to keep them. Please let
  me know if you disagree.


Wolfram Sang (10):
  i2c: add suspended flag and accessors for i2c adapters
  i2c: reject new transfers when adapters are suspended
  i2c: synquacer: remove unused is_suspended flag
  i2c: brcmstb: use core helper to mark adapter suspended
  i2c: zx2967: use core helper to mark adapter suspended
  i2c: sprd: don't use pdev as variable name for struct device *
  i2c: sprd: use core helper to mark adapter suspended
  i2c: exynos5: use core helper to mark adapter suspended
  i2c: s3c2410: use core helper to mark adapter suspended
  i2c: rcar: add suspend/resume support

After a long road, I applied this series now to for-next. I only
squashed patches 1+2 to have the functionality in one place. And fixed a
typo in patch 1. Thanks to the testers and reviewers, and especially
Hans, for the input and discussions.

This will now get a full test cycle in -next. Let's see what happens...

And let's move on to how to add 'very late transfers without irqs' on
top of this series.

Happy hacking,

   Wolfram