linux-kernel - [PATCH v1 3/9] ACPI: processor: idle: Return failure when get lpi_state->arch

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Message-ID: <20250929093754.3998136-4-lihuisong@huawei.com>
Date: Mon, 29 Sep 2025 17:37:48 +0800
From: Huisong Li <lihuisong@...wei.com>
To: <rafael@...nel.org>, <lenb@...nel.org>
CC: <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<Sudeep.Holla@....com>, <linuxarm@...wei.com>, <jonathan.cameron@...wei.com>,
	<zhanjie9@...ilicon.com>, <zhenglifeng1@...wei.com>, <yubowen8@...wei.com>,
	<lihuisong@...wei.com>
Subject: [PATCH v1 3/9] ACPI: processor: idle: Return failure when get lpi_state->arch_flags failed

The architecture specific context loss flags is important for ARM.
And this flag is used to control the execution of different code
flows in acpi_processor_ffh_lpi_enter().

So it is better to return failure when get lpi_state->arch_flags
failed.

Fixes: a36a7fecfe60 ("ACPI / processor_idle: Add support for Low Power Idle(LPI) states")
Signed-off-by: Huisong Li <lihuisong@...wei.com>
---
 drivers/acpi/processor_idle.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 681587f2614b..f36f9514b6c7 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -984,8 +984,11 @@ static int acpi_processor_evaluate_lpi(acpi_handle handle,
 		if (obj_get_integer(pkg_elem + 2, &lpi_state->flags))
 			lpi_state->flags = 0;
 
-		if (obj_get_integer(pkg_elem + 3, &lpi_state->arch_flags))
-			lpi_state->arch_flags = 0;
+		if (obj_get_integer(pkg_elem + 3, &lpi_state->arch_flags)) {
+			pr_err("Get architecture specific context loss flags failed.\n");
+			ret = -EINVAL;
+			goto end;
+		}
 
 		if (obj_get_integer(pkg_elem + 4, &lpi_state->res_cnt_freq))
 			lpi_state->res_cnt_freq = 1;
-- 
2.33.0