Hi Jason, On 24 October 2017 at 21:25, Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx> wrote: > On Tue, Oct 24, 2017 at 09:21:15PM +0530, PrasannaKumar Muralidharan wrote: > >> Please check the RFC [1]. It does use chip id. The rfc has issues and >> has to be fixed but still there could be users of the API. >> >> 1. https://www.spinics.net/lists/linux-crypto/msg28282.html > > That patch isn't safe at all. You need to store a kref to th chip in > the hwrng, not parse a string. The drivers/char/hw_random/tpm-rng.c module does not store the chip reference so I guess the usage is safe. The RFC is just a sample use case of the API. Regards, PrasannaKumar
