security/tpm/tspi: Clear TPM state if resume fails

Per TPM spec and edk2 reference, perform a TPM restart in the case that a TPM resume fails. Change-Id: I444ab3cb12acbff740b5b8d2a9f7bed06392e9ec Signed-off-by: Tim Crawford <[email protected]>
system76 · Jun 16, 2023 · 04e48d4 · 04e48d4
1 parent a7d1fea
commit 04e48d4
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/security/tpm/tspi/tspi.c b/src/security/tpm/tspi/tspi.c
@@ -71,6 +71,10 @@ static uint32_t tpm_setup_s3_helper(void)
 
 	default:
 		printk(BIOS_ERR, "TPM: Resume failed (%#x).\n", result);
+		if (CONFIG(TPM2)) {
+			printk(BIOS_WARNING, "TPM: Clearing state\n");
+			result = tlcl_startup();
+		}
 		break;
 	}