Change in coreboot[master]: drivers/usb/acpi: Avoid dereferencing maybe-NULL pointer

[Tim Wawrzynczak (Code Review)]

Tim Wawrzynczak has submitted this change. ( https://review.coreboot.org/c/coreboot/+/56266 )

Change subject: drivers/usb/acpi: Avoid dereferencing maybe-NULL pointer
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drivers/usb/acpi: Avoid dereferencing maybe-NULL pointer

Do not dereference a pointer before checking whether it is NULL.

Change-Id: Icbe9ae99d91fd587d8e56cf3a0dcb59834ee6d07
Found-by: Coverity CID 1458232
Signed-off-by: Angel Pons 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56266
Reviewed-by: Tim Wawrzynczak 
Reviewed-by: Furquan Shaikh 
Reviewed-by: Raul Rangel 
Tested-by: build bot (Jenkins) 
---
M src/drivers/usb/acpi/usb_acpi.c
1 file changed, 2 insertions(+), 1 deletion(-)

Approvals:
  build bot (Jenkins): Verified
  Furquan Shaikh: Looks good to me, approved
  Raul Rangel: Looks good to me, approved
  Tim Wawrzynczak: Looks good to me, approved

diff --git a/src/drivers/usb/acpi/usb_acpi.c b/src/drivers/usb/acpi/usb_acpi.c
index 8ada939..fb9f7f1 100644
--- a/src/drivers/usb/acpi/usb_acpi.c
+++ b/src/drivers/usb/acpi/usb_acpi.c
@@ -125,12 +125,13 @@

bool usb_acpi_get_pld(const struct device *usb_device, struct acpi_pld *pld)
 {
-	struct drivers_usb_acpi_config *config = usb_device->chip_info;
+	struct drivers_usb_acpi_config *config;

if (!usb_device || !usb_device->chip_info ||
    	usb_device->chip_ops != &drivers_usb_acpi_ops)
    	return false;

+	config = usb_device->chip_info;
    if (config->use_custom_pld)
    	*pld = config->custom_pld;
    else