linux-kernel - Re: [PATCH net-next v4 3/6] net: lan966x: add port module support

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Message-ID: <20211129105926.4k6itzqakeu7znbw@soft-dev3-1.localhost>
Date:   Mon, 29 Nov 2021 11:59:26 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     <davem@...emloft.net>, <robh+dt@...nel.org>,
        <UNGLinuxDriver@...rochip.com>, <p.zabel@...gutronix.de>,
        <linux@...linux.org.uk>, <andrew@...n.ch>,
        <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next v4 3/6] net: lan966x: add port module support

The 11/26/2021 10:12, Jakub Kicinski wrote:

Hi Jakub,

> 
> On Fri, 26 Nov 2021 10:05:37 +0100 Horatiu Vultur wrote:
> > This patch adds support for netdev and phylink in the switch. The
> > injection + extraction is register based. This will be replaced with DMA
> > accees.
> >
> > Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
> 
> Clang sees issues here:
> 
> drivers/net/ethernet/microchip/lan966x/lan966x_main.c:409:8: warning: variable 'sz' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
>                        if (err != 4)
>                            ^~~~~~~~
> drivers/net/ethernet/microchip/lan966x/lan966x_main.c:469:7: note: uninitialized use occurs here
>                if (sz < 0 || err)
>                    ^~
> drivers/net/ethernet/microchip/lan966x/lan966x_main.c:409:4: note: remove the 'if' if its condition is always false
>                        if (err != 4)
>                        ^~~~~~~~~~~~~
> drivers/net/ethernet/microchip/lan966x/lan966x_main.c:403:9: note: initialize the variable 'sz' to silence this warning
>                int sz, buf_len;
>                      ^
>                       = 0

Thanks for notification.
I should definitely need to start to build the kernel using Clang.


-- 
/Horatiu