From: Andrew Lunn <andrew@lunn.ch>
To: "Ameer Hamza" <amhamza.mgc@gmail.com>, "Marek Behún" <kabel@kernel.org>
Cc: vivien.didelot@gmail.com, f.fainelli@gmail.com,
olteanv@gmail.com, davem@davemloft.net, kuba@kernel.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] net: dsa: mv88e6xxx: initialize return variable on declaration
Date: Mon, 6 Dec 2021 14:21:03 +0100 [thread overview]
Message-ID: <Ya4OP+jQYd/UwiQK@lunn.ch> (raw)
In-Reply-To: <20211206113219.17640-1-amhamza.mgc@gmail.com>
On Mon, Dec 06, 2021 at 04:32:19PM +0500, Ameer Hamza wrote:
> Uninitialized err variable defined in mv88e6393x_serdes_power
> function may cause undefined behaviour if it is called from
> mv88e6xxx_serdes_power_down context.
>
> Addresses-Coverity: 1494644 ("Uninitialized scalar variable")
>
> Signed-off-by: Ameer Hamza <amhamza.mgc@gmail.com>
> ---
> drivers/net/dsa/mv88e6xxx/serdes.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/dsa/mv88e6xxx/serdes.c b/drivers/net/dsa/mv88e6xxx/serdes.c
> index 55273013bfb5..33727439724a 100644
> --- a/drivers/net/dsa/mv88e6xxx/serdes.c
> +++ b/drivers/net/dsa/mv88e6xxx/serdes.c
> @@ -1507,7 +1507,7 @@ int mv88e6393x_serdes_power(struct mv88e6xxx_chip *chip, int port, int lane,
> bool on)
> {
> u8 cmode = chip->ports[port].cmode;
> - int err;
> + int err = 0;
>
> if (port != 0 && port != 9 && port != 10)
> return -EOPNOTSUPP;
Hi Marek
This warning likely comes from cmode not being a SERDES mode, and that
is not handles in the switch statementing. Do we want an
default:
err = EINVAL;
?
Andrew
next prev parent reply other threads:[~2021-12-06 13:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-06 11:32 [PATCH] net: dsa: mv88e6xxx: initialize return variable on declaration Ameer Hamza
2021-12-06 13:21 ` Andrew Lunn [this message]
2021-12-06 22:29 ` Marek Behún
2021-12-07 0:25 ` Jakub Kicinski
2021-12-07 13:06 ` Marek Behún
2021-12-08 14:04 ` [PATCH v2] net: dsa: mv88e6xxx: error handling for serdes_power functions Ameer Hamza
2021-12-08 14:09 ` Ameer Hamza
2021-12-08 15:04 ` Jakub Kicinski
2021-12-08 15:40 ` Marek Behún
2021-12-08 15:58 ` [PATCH v3] " Ameer Hamza
2021-12-08 16:18 ` Marek Behún
2021-12-09 1:28 ` Jakub Kicinski
2021-12-09 4:06 ` Ameer Hamza
2021-12-09 4:07 ` [PATCH v4] " Ameer Hamza
2021-12-09 4:15 ` Ameer Hamza
2021-12-09 15:50 ` patchwork-bot+netdevbpf
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