1 files changed, 23 insertions, 7 deletions

diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 1a803b0cf980..129f640424b7 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -663,7 +663,8 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
 		return len;
 
 	err = be32_to_cpu(header->return_code);
-	if (err != 0 && desc)
+	if (err != 0 && err != TPM_ERR_DISABLED && err != TPM_ERR_DEACTIVATED
+	    && desc)
 		dev_err(&chip->dev, "A TPM error (%d) occurred %s\n", err,
 			desc);
 	if (err)
@@ -1321,7 +1322,8 @@ int tpm_get_random(struct tpm_chip *chip, u8 *out, size_t max)
 		}
 
 		rlength = be32_to_cpu(tpm_cmd.header.out.length);
-		if (rlength < offsetof(struct tpm_getrandom_out, rng_data) +
+		if (rlength < TPM_HEADER_SIZE +
+			      offsetof(struct tpm_getrandom_out, rng_data) +
 			      recd) {
 			total = -EFAULT;
 			break;
@@ -1407,19 +1409,32 @@ static int __init tpm_init(void)
 	tpmrm_class = class_create(THIS_MODULE, "tpmrm");
 	if (IS_ERR(tpmrm_class)) {
 		pr_err("couldn't create tpmrm class\n");
-		class_destroy(tpm_class);
-		return PTR_ERR(tpmrm_class);
+		rc = PTR_ERR(tpmrm_class);
+		goto out_destroy_tpm_class;
 	}
 
 	rc = alloc_chrdev_region(&tpm_devt, 0, 2*TPM_NUM_DEVICES, "tpm");
 	if (rc < 0) {
 		pr_err("tpm: failed to allocate char dev region\n");
-		class_destroy(tpmrm_class);
-		class_destroy(tpm_class);
-		return rc;
+		goto out_destroy_tpmrm_class;
+	}
+
+	rc = tpm_dev_common_init();
+	if (rc) {
+		pr_err("tpm: failed to allocate char dev region\n");
+		goto out_unreg_chrdev;
 	}
 
 	return 0;
+
+out_unreg_chrdev:
+	unregister_chrdev_region(tpm_devt, 2 * TPM_NUM_DEVICES);
+out_destroy_tpmrm_class:
+	class_destroy(tpmrm_class);
+out_destroy_tpm_class:
+	class_destroy(tpm_class);
+
+	return rc;
 }
 
 static void __exit tpm_exit(void)
@@ -1428,6 +1443,7 @@ static void __exit tpm_exit(void)
 	class_destroy(tpm_class);
 	class_destroy(tpmrm_class);
 	unregister_chrdev_region(tpm_devt, 2*TPM_NUM_DEVICES);
+	tpm_dev_common_exit();
 }
 
 subsys_initcall(tpm_init);