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Subject[PATCH 5.11 004/329] tpm, tpm_tis: Reserve locality in tpm_tis_resume()
Date
From: Jarkko Sakkinen <jarkko@kernel.org>

commit 8a2d296aaebadd68d9c1f6908667df1d1c84c051 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: a3fbfae82b4c ("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>
---
drivers/char/tpm/tpm_tis_core.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)

--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -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);

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