linux-kernel - [PATCH] platform/mellanox: mlxreg-hotplug: Fix uninitialized variable

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Message-Id: <1517994724-5931-1-git-send-email-geert@linux-m68k.org>
Date:   Wed,  7 Feb 2018 10:12:04 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Andy Shevchenko <andy@...radead.org>,
        Darren Hart <dvhart@...radead.org>,
        Vadim Pasternak <vadimp@...lanox.com>
Cc:     Arnd Bergmann <arnd@...db.de>, platform-driver-x86@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH] platform/mellanox: mlxreg-hotplug: Fix uninitialized variable

With gcc-4.1.2:

    drivers/platform/mellanox/mlxreg-hotplug.c: In function ‘mlxreg_hotplug_health_work_helper’:
    drivers/platform/mellanox/mlxreg-hotplug.c:347: warning: ‘ret’ is used uninitialized in this function

Indeed, if mlxreg_core_item.count is zero, ret is used uninitialized.

While this is unlikely to happen (it is set to ARRAY_SIZE(...) in x86
board files), this is done in another source file, so fix this by
preinitializing ret to zero.

Fixes: c6acad68eb2dbffd ("platform/mellanox: mlxreg-hotplug: Modify to use a regmap interface")
Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
---
 drivers/platform/mellanox/mlxreg-hotplug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/mellanox/mlxreg-hotplug.c b/drivers/platform/mellanox/mlxreg-hotplug.c
index 0dfa1ca0d05b0217..313cf8ad77bf68ce 100644
--- a/drivers/platform/mellanox/mlxreg-hotplug.c
+++ b/drivers/platform/mellanox/mlxreg-hotplug.c
@@ -300,7 +300,7 @@ mlxreg_hotplug_health_work_helper(struct mlxreg_hotplug_priv_data *priv,
 {
 	struct mlxreg_core_data *data = item->data;
 	u32 regval;
-	int i, ret;
+	int i, ret = 0;
 
 	for (i = 0; i < item->count; i++, data++) {
 		/* Mask event. */
-- 
2.7.4