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tpm, tpm_tis: Reserve locality in tpm_tis_resume()

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commit 8a2d296aae upstream.

Reserve locality in tpm_tis_resume(), as it could be unsert after waking
up from a sleep state.

Cc: stable@vger.kernel.org
Cc: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Reported-by: Hans de Goede <hdegoede@redhat.com>
Fixes: a3fbfae82b ("tpm: take TPM chip power gating out of tpm_transmit()")
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jarkko Sakkinen 2021-05-10 15:28:31 +03:00 committed by Greg Kroah-Hartman
parent 9238661656
commit 53171e68a5
1 changed files with 10 additions and 2 deletions
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12
drivers/char/tpm/tpm_tis_core.c
View file

@ -1125,12 +1125,20 @@ int tpm_tis_resume(struct device *dev)
if (ret)
return ret;
/* TPM 1.2 requires self-test on resume. This function actually returns
/*
* TPM 1.2 requires self-test on resume. This function actually returns
* an error code but for unknown reason it isn't handled.
*/
if (!(chip->flags & TPM_CHIP_FLAG_TPM2))
if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
ret = request_locality(chip, 0);
if (ret < 0)
return ret;
tpm1_do_selftest(chip);
release_locality(chip, 0);
}
return 0;
}
EXPORT_SYMBOL_GPL(tpm_tis_resume);