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Message-Id: <20210608175946.008174907@linuxfoundation.org>
Date: Tue, 8 Jun 2021 20:25:46 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Tom Rix <trix@...hat.com>,
Filipe Laíns <lains@...eup.net>,
Jiri Kosina <jkosina@...e.cz>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.12 016/161] HID: logitech-hidpp: initialize level variable
From: Tom Rix <trix@...hat.com>
[ Upstream commit 81c8bf9170477d453b24a6bc3300d201d641e645 ]
Static analysis reports this representative problem
hid-logitech-hidpp.c:1356:23: warning: Assigned value is
garbage or undefined
hidpp->battery.level = level;
^ ~~~~~
In some cases, 'level' is never set in hidpp20_battery_map_status_voltage()
Since level is not available on all hw, initialize level to unknown.
Fixes: be281368f297 ("hid-logitech-hidpp: read battery voltage from newer devices")
Signed-off-by: Tom Rix <trix@...hat.com>
Reviewed-by: Filipe Laíns <lains@...eup.net>
Signed-off-by: Jiri Kosina <jkosina@...e.cz>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/hid/hid-logitech-hidpp.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index d459e2dbe647..f7710fb2f48d 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -1262,6 +1262,7 @@ static int hidpp20_battery_map_status_voltage(u8 data[3], int *voltage,
int status;
long flags = (long) data[2];
+ *level = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
if (flags & 0x80)
switch (flags & 0x07) {
--
2.30.2
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