linux-kernel - [PATCH net-next] net: sparx5: Fix initialization of variables on stack

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Message-ID: <20220304140918.3356873-1-horatiu.vultur@microchip.com>
Date:   Fri, 4 Mar 2022 15:09:18 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <netdev@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <llvm@...ts.linux.dev>
CC:     <davem@...emloft.net>, <kuba@...nel.org>,
        <UNGLinuxDriver@...rochip.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH net-next] net: sparx5: Fix initialization of variables on stack

The variables 'res' inside the functions sparx5_ptp_get_1ppm and
sparx5_ptp_get_nominal_value was not initialized. So in case of the default
case of the switch after, it would return an uninitialized variable.
This makes also the clang builds to failed.

Fixes: 0933bd04047c3b ("net: sparx5: Add support for ptp clocks")
Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
 drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c b/drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c
index fa377f6e7e08..cd110c31e5a4 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c
@@ -32,7 +32,7 @@ static u64 sparx5_ptp_get_1ppm(struct sparx5 *sparx5)
 	 * (1/1000000)/((2^-59)/X)
 	 */
 
-	u64 res;
+	u64 res = 0;
 
 	switch (sparx5->coreclock) {
 	case SPX5_CORE_CLOCK_250MHZ:
@@ -54,7 +54,7 @@ static u64 sparx5_ptp_get_1ppm(struct sparx5 *sparx5)
 
 static u64 sparx5_ptp_get_nominal_value(struct sparx5 *sparx5)
 {
-	u64 res;
+	u64 res = 0;
 
 	switch (sparx5->coreclock) {
 	case SPX5_CORE_CLOCK_250MHZ:
-- 
2.33.0