6a0086dd4d
tpmtis_go_ready() read the value of the TPM_STS register, ORed TPM_STS_CMD_READY with it, and wrote it back. However, the TPM Profile (PTP) specification states that only one bit in the write request value may be set to 1, or else the entire write request is ignored. Fix by just writing TPM_STS_CMD_READY. Similarly, remove the call which clears the TPM_STS_CMD_READY flag in the same function. It was being ignored for the same reason. Submitted by: Darrick Lew <darrick.freebsd AT gmail.com> Reviewed by: vangyzen, myself MFC after: if you care about stable, you might want to do so Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D23081
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