From 6bfe5344b2956d0bee116f1c640aef05e5cddd76 Mon Sep 17 00:00:00 2001
From: Erik Kaneda <erik.kaneda@intel.com>
Date: Mon, 4 May 2020 17:46:52 -0700
Subject: [PATCH] ACPICA: Dispatcher: add status checks
Git-commit: 6bfe5344b2956d0bee116f1c640aef05e5cddd76
Patch-mainline: v5.8-rc1
References: git-fixes

ACPICA commit 3244c1eeba9f9fb9ccedb875f7923a3d85e0c6aa

The status chekcs are used to to avoid NULL pointer dereference on
field objects

Link: https://github.com/acpica/acpica/commit/3244c1ee
Reported-by: Kurt Kennett <kurt_kennett@hotmail.com>
Signed-off-by: Erik Kaneda <erik.kaneda@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/acpi/acpica/dsfield.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/acpi/acpica/dsfield.c b/drivers/acpi/acpica/dsfield.c
index 0189b5d4e3a3..fa768b3a989e 100644
--- a/drivers/acpi/acpica/dsfield.c
+++ b/drivers/acpi/acpica/dsfield.c
@@ -517,13 +517,20 @@ acpi_ds_create_field(union acpi_parse_object *op,
 	info.region_node = region_node;
 
 	status = acpi_ds_get_field_names(&info, walk_state, arg->common.next);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
 	if (info.region_node->object->region.space_id ==
-	    ACPI_ADR_SPACE_PLATFORM_COMM
-	    && !(region_node->object->field.internal_pcc_buffer =
-		 ACPI_ALLOCATE_ZEROED(info.region_node->object->region.
-				      length))) {
-		return_ACPI_STATUS(AE_NO_MEMORY);
+	    ACPI_ADR_SPACE_PLATFORM_COMM) {
+		region_node->object->field.internal_pcc_buffer =
+		    ACPI_ALLOCATE_ZEROED(info.region_node->object->region.
+					 length);
+		if (!region_node->object->field.internal_pcc_buffer) {
+			return_ACPI_STATUS(AE_NO_MEMORY);
+		}
 	}
+
 	return_ACPI_STATUS(status);
 }
 
-- 
2.16.4