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From:   Roberto Sassu <roberto.sassu@huawei.com>
To:     <jarkko.sakkinen@linux.intel.com>, <zohar@linux.ibm.com>
CC:     <linux-integrity@vger.kernel.org>,
        <linux-security-module@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <silviu.vlasceanu@huawei.com>,
        Roberto Sassu <roberto.sassu@huawei.com>
Subject: [PATCH v3 1/5] tpm: change the end marker of the active_banks array to zero
Date:   Tue, 30 Oct 2018 16:47:07 +0100
Message-ID: <20181030154711.2782-2-roberto.sassu@huawei.com>
In-Reply-To: <20181030154711.2782-1-roberto.sassu@huawei.com>
References: <20181030154711.2782-1-roberto.sassu@huawei.com>
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Sender: linux-kernel-owner@vger.kernel.org
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This patch changes the end marker of the active_banks array from
TPM2_ALG_ERROR to zero.

Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
---
 drivers/char/tpm/tpm-interface.c | 2 +-
 drivers/char/tpm/tpm2-cmd.c      | 3 ---
 2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 1a803b0cf980..f7fc4b5ee239 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -1051,7 +1051,7 @@ int tpm_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash)
 		memset(digest_list, 0, sizeof(digest_list));
 
 		for (i = 0; i < ARRAY_SIZE(chip->active_banks) &&
-			    chip->active_banks[i] != TPM2_ALG_ERROR; i++) {
+			    chip->active_banks[i]; i++) {
 			digest_list[i].alg_id = chip->active_banks[i];
 			memcpy(digest_list[i].digest, hash, TPM_DIGEST_SIZE);
 			count++;
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index c31b490bd41d..046c9d8f3c1e 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -908,9 +908,6 @@ static ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip)
 	}
 
 out:
-	if (i < ARRAY_SIZE(chip->active_banks))
-		chip->active_banks[i] = TPM2_ALG_ERROR;
-
 	tpm_buf_destroy(&buf);
 
 	return rc;
-- 
2.17.1