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-rw-r--r--drivers/char/tpm/tpm.c9
-rw-r--r--drivers/char/tpm/tpm.h3
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index 6a8771f47a55..32362cf35b8d 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -846,6 +846,15 @@ int tpm_do_selftest(struct tpm_chip *chip)
do {
rc = __tpm_pcr_read(chip, 0, digest);
+ if (rc == TPM_ERR_DISABLED || rc == TPM_ERR_DEACTIVATED) {
+ dev_info(chip->dev,
+ "TPM is disabled/deactivated (0x%X)\n", rc);
+ /* TPM is disabled and/or deactivated; driver can
+ * proceed and TPM does handle commands for
+ * suspend/resume correctly
+ */
+ return 0;
+ }
if (rc != TPM_WARN_DOING_SELFTEST)
return rc;
msleep(delay_msec);
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 8c1df302fbb6..010547138281 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -39,6 +39,9 @@ enum tpm_addr {
};
#define TPM_WARN_DOING_SELFTEST 0x802
+#define TPM_ERR_DEACTIVATED 0x6
+#define TPM_ERR_DISABLED 0x7
+
#define TPM_HEADER_SIZE 10
extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr,
char *);