Change in coreboot[master]: security/tpm: Check for NULL pointer

[Furquan Shaikh (Code Review)]

Furquan Shaikh has uploaded this change for review. ( https://review.coreboot.org/27933

Change subject: security/tpm: Check for NULL pointer
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security/tpm: Check for NULL pointer

Change bce49c2 missed checking for NULL pointer before accessing the
tcpa_table returned by tcpa_log_init. This change fixes the boot hang
observed on octopus by ensuring pointer is checked for NULL before
using it.

BUG=b:111403731
TEST=Verified that octopus boots up fine.

Change-Id: I2e46197065f8db1dc028a85551546263e60d46b2
Signed-off-by: Furquan Shaikh 
---
M src/security/tpm/tspi/log.c
1 file changed, 4 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/33/27933/1

diff --git a/src/security/tpm/tspi/log.c b/src/security/tpm/tspi/log.c
index 0a6655a..17f6f1f 100644
--- a/src/security/tpm/tspi/log.c
+++ b/src/security/tpm/tspi/log.c
@@ -57,6 +57,10 @@
    struct tcpa_entry *tce;

tclt = tcpa_log_init();
+
+	if (!tclt)
+		return;
+
    if (tclt->num_entries == tclt->max_entries) {
    	printk(BIOS_WARNING, "ERROR: TCPA log table is full\n");
    	return;