linux-kernel - [PATCH] acpi: resource: Use AE_ABORT_METHOD to terminate acpi_dev_get

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Message-Id: <20201204002740.300109-1-djrscally@gmail.com>
Date:   Fri,  4 Dec 2020 00:27:40 +0000
From:   Daniel Scally <djrscally@...il.com>
To:     linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     rjw@...ysocki.net, lenb@...nel.org, mika.westerberg@...ux.intel.com
Subject: [PATCH] acpi: resource: Use AE_ABORT_METHOD to terminate acpi_dev_get_resources()

Switching this function to AE_CTRL_TERMINATE broke the documented
behaviour of acpi_dev_get_resources() - AE_CTRL_TERMINATE does not, in
fact, terminate the resource walk because acpi_walk_resource_buffer()
ignores it (specifically converting it to AE_OK), referring to that
value as "an OK termination by the user function". This means that
acpi_dev_get_resources() does not abort processing when the preproc
function returns a negative value.

Revert to AE_ABORT_METHOD

Fixes: 8a66790b7850 ("ACPI / resources: Use AE_CTRL_TERMINATE to terminate resources walks")
Signed-off-by: Daniel Scally <djrscally@...il.com>
---
 drivers/acpi/resource.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index ad04824ca3ba..f2f5f1dc7c61 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -541,7 +541,7 @@ static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
 		ret = c->preproc(ares, c->preproc_data);
 		if (ret < 0) {
 			c->error = ret;
-			return AE_CTRL_TERMINATE;
+			return AE_ABORT_METHOD;
 		} else if (ret > 0) {
 			return AE_OK;
 		}
-- 
2.25.1