[PATCH v16 11/38] tpm/tpm_tis: Close all localities

[Ross Philipson]

From: "Daniel P. Smith" <dpsmith at apertussolutions.com>

Close all the localities while initializing the TPM driver. The addition
of TCG DRTM support requires this.

Co-developed-by: Jarkko Sakkinen <jarkko at kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko at kernel.org>
Signed-off-by: Daniel P. Smith <dpsmith at apertussolutions.com>
Signed-off-by: Ross Philipson <ross.philipson at gmail.com>
---
 drivers/char/tpm/tpm_tis_core.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index e2a1769081b1..1fbb74a565f4 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -1111,7 +1111,7 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
 	u32 intmask;
 	u32 clkrun_val;
 	u8 rid;
-	int rc, probe;
+	int rc, probe, i;
 	struct tpm_chip *chip;
 
 	chip = tpmm_chip_alloc(dev, &tpm_tis);
@@ -1176,6 +1176,15 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
 		goto out_err;
 	}
 
+	/*
+	 * In order to comply with the TCG DRTM specification, relinquish all
+	 * the localities.
+	 */
+	for (i = 0; i <= TPM_MAX_LOCALITY; i++) {
+		if (check_locality(chip, i))
+			tpm_tis_relinquish_locality(chip, i);
+	}
+
 	/* Take control of the TPM's interrupt hardware and shut it off */
 	rc = tpm_tis_read32(priv, TPM_INT_ENABLE(priv->locality), &intmask);
 	if (rc < 0)
-- 
2.47.3