Re: [patch 4/4] MFD: Change mfd platform device usage to wrapper platform_device

[Russell King - ARM Linux]

On Wed, Jul 09, 2008 at 11:49:20AM +0100, Ben Dooks wrote:
> This patch changes the mfd core behaviour to wrapper the platform_device
> it creates in an struct mfd_device which contains the information
> about the cell that was created.

You can't do this.  Grab a reference to the platform device (by holding
one of its sysfs files open) and then remove all the users of the mfd-core
module and the mfd-core module itself.

Then, read from that file and close it.  Watch your kernel oops.

That's why device release methods inside modules are a BAD IDEA and why
we have the platform device alloc API.
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