On Thu, 2018-06-28 at 18:13 +0300, Tomas Winkler wrote: > Fix tpm ptt initialization error: > tpm tpm0: A TPM error (378) occurred get tpm pcr allocation. > > We cannot use go_idle cmd_ready commands via runtime_pm handles > as with the introduction of localities this is no longer an optional > feature, while runtime pm can be not enabled. > Though cmd_ready/go_idle provides a power saving, it's also a part of > TPM2 protocol and should be called explicitly. > This patch exposes cmd_read/go_idle via tpm class ops and removes > runtime pm support as it is not used by any driver. > > When calling from nested context always use both flags: > TPM_TRANSMIT_UNLOCKED and TPM_TRANSMIT_RAW. Both are needed to resolve > tpm spaces and locality request recursive calls to tpm_transmit(). > TPM_TRANSMIT_RAW should never be used standalone as it will fail > on double locking. While TPM_TRANSMIT_UNLOCKED standalone should be > called from non-recursive locked contexts. > > New wrappers are added tpm_cmd_ready() and tpm_go_idle() to > streamline tpm_try_transmit code. > > tpm_crb no longer needs own power saving functions and can drop using > tpm_pm_suspend/resume. > > This patch cannot be really separated from the locality fix. > Fixes: 888d867df441 (tpm: cmd_ready command can be issued only after granting > locality) > > > Cc: stable@xxxxxxxxxxxxxxx > Fixes: 888d867df441 (tpm: cmd_ready command can be issued only after granting > locality) > Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx> /Jarkko
