Change in coreboot[master]: drivers/generic/gfx: Add null pointer error check

[Jacob Garber (Code Review)]

Jacob Garber has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/38669 )

Change subject: drivers/generic/gfx: Add null pointer error check
......................................................................

drivers/generic/gfx: Add null pointer error check

acpi_device_scope() will return NULL if it is unable to find the path
of the parent device. Return early if this is the case to prevent a null
pointer dereference.

Change-Id: I3eff1c1e3477c75c7130b52898de7d59692ba412
Signed-off-by: Jacob Garber 
Found-by: Coverity CID 1409672
---
M src/drivers/generic/gfx/gfx.c
1 file changed, 3 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/69/38669/1

diff --git a/src/drivers/generic/gfx/gfx.c b/src/drivers/generic/gfx/gfx.c
index b2bda4a..0386e9b 100644
--- a/src/drivers/generic/gfx/gfx.c
+++ b/src/drivers/generic/gfx/gfx.c
@@ -69,6 +69,9 @@

const char *scope = acpi_device_scope(dev);

+	if (!scope)
+		return;
+
    acpigen_write_scope(scope);

/* Method (_DOD, 0) */