linux-kernel - [PATCH] acpi: fix 'return' with no value build warning

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Date:   Fri, 31 Jul 2020 11:39:04 +0800
From:   Neal Liu <neal.liu@...iatek.com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Sami Tolvanen <samitolvanen@...gle.com>
CC:     Neal Liu <neal.liu@...iatek.com>, <linux-acpi@...r.kernel.org>,
        <linux-pm@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        lkml <linux-kernel@...r.kernel.org>, <wsd_upstream@...iatek.com>
Subject: [PATCH] acpi: fix 'return' with no value build warning

Fixing CFI issue which introduced by commit efe9711214e6 is
incomplete.
Add return value to fix return-type build warning.

Signed-off-by: Neal Liu <neal.liu@...iatek.com>
---
 drivers/acpi/processor_idle.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 6ffb6c9..6870020 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -664,11 +664,11 @@ static int acpi_idle_enter_s2idle(struct cpuidle_device *dev,
 		struct acpi_processor *pr = __this_cpu_read(processors);
 
 		if (unlikely(!pr))
-			return;
+			return -EFAULT;
 
 		if (pr->flags.bm_check) {
 			acpi_idle_enter_bm(pr, cx, false);
-			return;
+			return 0;
 		} else {
 			ACPI_FLUSH_CPU_CACHE();
 		}
-- 
1.7.9.5