--- kernel-2.6.33mamba/drivers/char/tpm/tpm.c.orig	2010-09-29 22:17:07.000000000 +0200
+++ kernel-2.6.33mamba/drivers/char/tpm/tpm.c	2010-09-29 22:22:55.000000000 +0200
@@ -353,12 +353,14 @@ unsigned long tpm_calc_ordinal_duration(
 		    tpm_protected_ordinal_duration[ordinal &
 						   TPM_PROTECTED_ORDINAL_MASK];
 
-	if (duration_idx != TPM_UNDEFINED)
+	if (duration_idx != TPM_UNDEFINED) {
 		duration = chip->vendor.duration[duration_idx];
-	if (duration <= 0)
+		/* if duration is 0, it's because chip->vendor.duration wasn't */
+		/* filled yet, so we set the lowest timeout just to give enough */
+		/* time to tpm_get_timeouts() succeed */
+		return (duration <= 0 ? HZ : duration);
+	} else
 		return 2 * 60 * HZ;
-	else
-		return duration;
 }
 EXPORT_SYMBOL_GPL(tpm_calc_ordinal_duration);