On Mon, Sep 28, 2020 at 11:00:12AM -0700, James Bottomley wrote: > Some TIS based TPMs can return 0xff to status reads if the locality > hasn't been properly requested. Detect this condition by checking the > bits that the TIS spec specifies must return zero are clear and return > zero in that case. Also drop a warning so the problem can be > identified in the calling path and fixed (usually a missing > try_get_ops()). > > Signed-off-by: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> > > This is the patch I've been using to catch and kill all the points in > the stack where we're not properly using get/put ops on the tpm chip. If this is a problem add a lockdep on ops_sem in various places too? Jason
