[S] Change in coreboot[main]: soc/intel/cnvi: Deref BTRK as it might not exist

[Sean Rhodes (Code Review)]

Sean Rhodes has submitted this change. ( https://review.coreboot.org/c/coreboot/+/86450?usp=email )

Change subject: soc/intel/cnvi: Deref BTRK as it might not exist
......................................................................

soc/intel/cnvi: Deref BTRK as it might not exist

Check for the existence of BTRK method before attempting to
call it, as coreboot doesn't enforce its creation.

Change-Id: Ibb0dace635c6a014ce65ae3d1c96a92ff991ce5b
Signed-off-by: Sean Rhodes 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86450
Tested-by: build bot (Jenkins) 
Reviewed-by: Matt DeVillier 
---
M src/soc/intel/common/block/cnvi/cnvi.c
1 file changed, 16 insertions(+), 10 deletions(-)

Approvals:
  Matt DeVillier: Looks good to me, approved
  build bot (Jenkins): Verified

diff --git a/src/soc/intel/common/block/cnvi/cnvi.c b/src/soc/intel/common/block/cnvi/cnvi.c
index e0a9566..f082197 100644
--- a/src/soc/intel/common/block/cnvi/cnvi.c
+++ b/src/soc/intel/common/block/cnvi/cnvi.c
@@ -129,11 +129,13 @@
  *					If (((PCRR (CNVI_SIDEBAND_ID, CNVI_ABORT_PLDR) & CNVI_ABORT_REQUEST) == Zero))
  *					{
  *						Local2 = Zero
- *						If ((_SB.PCI0.GBTR() == One))
- *						{
- *							_SB.PCI0.BTRK (Zero)
- *							Sleep (105)
- *							Local2 = One
+ *						If (CondRefOf (_SB.PCI0.GBTR)) {
+ *							If ((_SB.PCI0.GBTR() == One))
+ *							{
+ *								_SB.PCI0.BTRK (Zero)
+ *								Sleep (105)
+ *								Local2 = One
+ *							}
  *						}
  *						PCRO (CNVI_SIDEBAND_ID, CNVI_ABORT_PLDR, CNVI_ABORT_REQUEST | CNVI_ABORT_ENABLE)
  *						Sleep (10)
@@ -233,14 +235,18 @@
    				acpigen_write_if_lequal_op_int(LOCAL0_OP, 0);
    				{
    					acpigen_write_store_int_to_op(0, LOCAL2_OP);
-						acpigen_write_if_lequal_namestr_int("\_SB.PCI0.GBTR", 1);
+						acpigen_write_if_cond_ref_of("\_SB.PCI0.GBTR");
    					{
-							acpigen_emit_namestring("\_SB.PCI0.BTRK");
-							acpigen_emit_byte(0);
+							acpigen_write_if_lequal_namestr_int("\_SB.PCI0.GBTR", 1);
+							{
+								acpigen_emit_namestring("\_SB.PCI0.BTRK");
+								acpigen_emit_byte(0);

-							acpigen_write_sleep(105);
+								acpigen_write_sleep(105);

-							acpigen_write_store_ops(1, LOCAL2_OP);
+								acpigen_write_store_ops(1, LOCAL2_OP);
+							}
+							acpigen_pop_len();
    					}
    					acpigen_pop_len();