Change in coreboot[master]: security/tpm/tss/tcg-2.0/tss_marshaling.c: Avoid static analysis error

[Richard Spiegel (Code Review)]

Richard Spiegel has uploaded this change for review. ( https://review.coreboot.org/27931

Change subject: security/tpm/tss/tcg-2.0/tss_marshaling.c: Avoid static analysis error
......................................................................

security/tpm/tss/tcg-2.0/tss_marshaling.c: Avoid static analysis error

In procedure tpm_unmarshal_response(), variable "rc" is used early to
decide if it should return NULL. However, from that point on, the variable
is only |=, but not read. Thus it's causing a static analysis error. Add a
printk line using variable "rc" to avoid static analysis error.

BUG=b:112253891
TEST=Build and boot grunt.

Change-Id: I7575bc75104fd97f138224aa57561e68f6548e58
Signed-off-by: Richard Spiegel 
---
M src/security/tpm/tss/tcg-2.0/tss_marshaling.c
1 file changed, 3 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/31/27931/1

diff --git a/src/security/tpm/tss/tcg-2.0/tss_marshaling.c b/src/security/tpm/tss/tcg-2.0/tss_marshaling.c
index 86f2231..bd46a7c 100644
--- a/src/security/tpm/tss/tcg-2.0/tss_marshaling.c
+++ b/src/security/tpm/tss/tcg-2.0/tss_marshaling.c
@@ -554,6 +554,9 @@
    	       command, ibuf_remaining(ib));
    	return NULL;
    }
+	if (rc)
+		printk(BIOS_INFO, "Final tpm_unmarshal_response status 0x%x\n",
+				rc);

/* The entire message have been parsed. */
    return tpm2_resp;