Re: [PATCH] tpm: don't destroy chip device prematurely

From: Jason Gunthorpe
Date: Mon Oct 03 2016 - 12:03:25 EST

On Mon, Oct 03, 2016 at 03:42:25PM +0300, Jarkko Sakkinen wrote:

> > I've looked to the registration code and it indeed has few more issues


> > Maybe TPM_CHIP_FLAG_REGISTERED can be used for sealing the access
> > to the device during deregistration, current usage is void.

This is done via chip->ops = NULL and the rwlock scheme.

> Good catch BTW. This flag has gone quite obsolote.

I think all the drivers have been updated at this point so we can
probably get rid of it entirely.