linux-kernel - [PATCH] platform/x86: thinkpad_acpi: Fix uninitialized symbol

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Message-ID: <20240903172756.19235-1-kontakt@matthias-fetzer.de>
Date: Tue,  3 Sep 2024 19:27:56 +0200
From: Matthias Fetzer <kontakt@...thias-fetzer.de>
To: hmh@....eng.br,
	hdegoede@...hat.com,
	ilpo.jarvinen@...ux.intel.com,
	ibm-acpi-devel@...ts.sourceforge.net,
	platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Matthias Fetzer <kontakt@...thias-fetzer.de>
Subject: [PATCH] platform/x86: thinkpad_acpi: Fix uninitialized symbol

When the TPACPI_FAN_WR_ACPI_FANW branch is taken s stays uninitialized
and would be later used in a debug print.

Since the registers are always set to the same two static values inside the
branch s is initialized to 0.

Signed-off-by: Matthias Fetzer <kontakt@...thias-fetzer.de>
---
 drivers/platform/x86/thinkpad_acpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 8f7053920884..4c1b0553f872 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -8318,7 +8318,7 @@ static int fan_set_level_safe(int level)
 
 static int fan_set_enable(void)
 {
-	u8 s;
+	u8 s = 0;
 	int rc;
 
 	if (!fan_control_allowed)
-- 
2.46.0