Hi Jean,

do you have already something in mind how to proceed with the
i2c_setclientdata-topic? I could offer the following:

I modify my semantic patch to remove all set_clientdata(NULL) calls connected
to a kfree(). Then, we could have a look if there are still some left and
investigate why. Once all issues are resolved (maybe there are none), we should
know what to add in the core-layer, hopefully just the call to set_clientdata.

Regarding this comment:

> the core should just set the client data to NULL. If there are drivers that
> rely on the current behavior, then those drivers should be reviewed first as
> to the reason why they need it.

I could check if there is any probe-function calling get_clientdata and making
use of that? That is probably the most obvious thing which would need to rely
on the current behaviour or did I miss something?

Have a nice weekend,

   Wolfram

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |