On Thu, Mar 15, 2018 at 06:11:19PM +0800, Daniel Drake wrote: > Hi, > > Sorry for the delayed response. > > Unfortunately we had to return the affected machine to the vendor > (Acer Veriton X4110G) although given we have a fairly complete > understanding of the problem, perhaps we can find and push a fix > anyway. > > Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx> wrote: > > Can you try it on git://git.infradead.org/users/jjs/linux-tpmdd.git ? > > Maybe it is related to the LPC #CLKRUN issues we've had. > > I don't see anything relevant in that git tree, and it seems like > a distant issue from the CLKRUN changes that have been made. > > To recap, the first suspend works OK, and then the TPM shows shows the > following message on the first resume: > tpm tpm0: A TPM error(38) occured continue selftest > And error(38) is TPM_ERR_INVALID_POSTINIT which means the TPM is > not in the correct state. Then the following suspend will always > fail with the following messages. > tpm tpm0: Error (38) sending savestate before suspend > PM: Device 00:0b failed to suspend: error 38 > > tpm_crb is the driver here (not tpm2). > > This exact problem was also discussed in depth years ago at > https://lists.gt.net/linux/kernel/1358716 > > The patch that we used to avoid the issue is below. What do you think? I think this would work for me. /Jarkko > > Thanks > Daniel > > > --- > drivers/char/tpm/tpm-interface.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c > index 1d6729be4cd6..444ae2df4a06 100644 > --- a/drivers/char/tpm/tpm-interface.c > +++ b/drivers/char/tpm/tpm-interface.c > @@ -953,6 +953,10 @@ int tpm_do_selftest(struct tpm_chip *chip) > loops = jiffies_to_msecs(duration) / delay_msec; > > rc = tpm_continue_selftest(chip); > + if (rc == TPM_ERR_INVALID_POSTINIT) { > + chip->flags |= TPM_CHIP_FLAG_ALWAYS_POWERED; > + dev_info(&chip->dev, "TPM not ready (%d)\n", rc); > + } > /* This may fail if there was no TPM driver during a suspend/resume > * cycle; some may return 10 (BAD_ORDINAL), others 28 (FAILEDSELFTEST) > */ > -- > 2.14.1 >
