From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Date: Sat, 26 Nov 2016 11:39:35 +0000 (+0200)
Subject: tpm: export tpm2_flush_context_cmd
X-Git-Tag: v4.12-rc1~123^2~28
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9aa36b399a50bf8a1c9dae33c25164afae14e1e3;p=karo-tx-linux.git

tpm: export tpm2_flush_context_cmd

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Reviewed-by: James Bottomley <James.Bottomley@HansenPartnership.com>
---

diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 4937b56a275c..08c1f61d396f 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -541,6 +541,8 @@ int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
 int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, u32 count,
 		    struct tpm2_digest *digests);
 int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max);
+void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle,
+			    unsigned int flags);
 int tpm2_seal_trusted(struct tpm_chip *chip,
 		      struct trusted_key_payload *payload,
 		      struct trusted_key_options *options);
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index 881aea9732bf..620a27b0412b 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -418,6 +418,35 @@ static const struct tpm_input_header tpm2_get_tpm_pt_header = {
 	.ordinal = cpu_to_be32(TPM2_CC_GET_CAPABILITY)
 };
 
+/**
+ * tpm2_flush_context_cmd() - execute a TPM2_FlushContext command
+ * @chip: TPM chip to use
+ * @payload: the key data in clear and encrypted form
+ * @options: authentication values and other options
+ *
+ * Return: same as with tpm_transmit_cmd
+ */
+void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle,
+			    unsigned int flags)
+{
+	struct tpm_buf buf;
+	int rc;
+
+	rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_FLUSH_CONTEXT);
+	if (rc) {
+		dev_warn(&chip->dev, "0x%08x was not flushed, out of memory\n",
+			 handle);
+		return;
+	}
+
+	tpm_buf_append_u32(&buf, handle);
+
+	(void) tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, 0, flags,
+				"flushing context");
+
+	tpm_buf_destroy(&buf);
+}
+
 /**
  * tpm_buf_append_auth() - append TPMS_AUTH_COMMAND to the buffer.
  *
@@ -627,39 +656,6 @@ out:
 	return rc;
 }
 
-/**
- * tpm2_flush_context_cmd() - execute a TPM2_FlushContext command
- *
- * @chip: TPM chip to use
- * @handle: the key data in clear and encrypted form
- * @flags: tpm transmit flags
- *
- * Return: Same as with tpm_transmit_cmd.
- */
-static void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle,
-				   unsigned int flags)
-{
-	struct tpm_buf buf;
-	int rc;
-
-	rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_FLUSH_CONTEXT);
-	if (rc) {
-		dev_warn(&chip->dev, "0x%08x was not flushed, out of memory\n",
-			 handle);
-		return;
-	}
-
-	tpm_buf_append_u32(&buf, handle);
-
-	rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, 0, flags,
-			      "flushing context");
-	if (rc)
-		dev_warn(&chip->dev, "0x%08x was not flushed, rc=%d\n", handle,
-			 rc);
-
-	tpm_buf_destroy(&buf);
-}
-
 /**
  * tpm2_unseal_cmd() - execute a TPM2_Unload command
  *