[coreboot-gerrit] Change in ...coreboot[master]: mb/google/link: Prevent null pointer dereference

[Jacob Garber (Code Review)]

Jacob Garber has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/33154

Change subject: mb/google/link: Prevent null pointer dereference
......................................................................

mb/google/link: Prevent null pointer dereference

Only check the lastidread if there is one.

Change-Id: I81248192fe52b2d536976385715bc54aa73d450c
Signed-off-by: Jacob Garber 
Found-by: Coverity CID 1375985
---
M src/mainboard/google/link/i915.c
1 file changed, 1 insertion(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/54/33154/1

diff --git a/src/mainboard/google/link/i915.c b/src/mainboard/google/link/i915.c
index 12d424c..35a30c9 100644
--- a/src/mainboard/google/link/i915.c
+++ b/src/mainboard/google/link/i915.c
@@ -173,7 +173,7 @@
    		if (verbose & vio)
    			printk(BIOS_SPEW, "\texpect %08lx\n", id->data);
    		/* we're looking for something. */
-			if (lastidread->addr == id->addr){
+			if ((lastidread != NULL) && (lastidread->addr == id->addr)) {
    			/* they're going to be polling.
    			 * just do it 1000 times
    			 */