netdev - Re: [PATCH] [v4] myri10ge: avoid uninitialized variable use

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Message-Id: 
 <177043802159.1183264.4531591321232273015.git-patchwork-notify@kernel.org>
Date: Sat, 07 Feb 2026 04:20:21 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Arnd Bergmann <arnd@...nel.org>
Cc: andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com,
 kuba@...nel.org, pabeni@...hat.com, arnd@...db.de, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [v4] myri10ge: avoid uninitialized variable use

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Thu,  5 Feb 2026 17:28:09 +0100 you wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> While compile testing on less common architectures, I noticed that gcc-10 on
> s390 finds a bug that all other configurations seem to miss:
> 
> drivers/net/ethernet/myricom/myri10ge/myri10ge.c: In function 'myri10ge_set_multicast_list':
> drivers/net/ethernet/myricom/myri10ge/myri10ge.c:391:25: error: 'cmd.data0' is used uninitialized in this function [-Werror=uninitialized]
>   391 |  buf->data0 = htonl(data->data0);
>       |                         ^~
> drivers/net/ethernet/myricom/myri10ge/myri10ge.c:392:25: error: '*((void *)&cmd+4)' is used uninitialized in this function [-Werror=uninitialized]
>   392 |  buf->data1 = htonl(data->data1);
>       |                         ^~
> drivers/net/ethernet/myricom/myri10ge/myri10ge.c: In function 'myri10ge_allocate_rings':
> drivers/net/ethernet/myricom/myri10ge/myri10ge.c:392:13: error: 'cmd.data1' is used uninitialized in this function [-Werror=uninitialized]
>   392 |  buf->data1 = htonl(data->data1);
> drivers/net/ethernet/myricom/myri10ge/myri10ge.c:1939:22: note: 'cmd.data1' was declared here
>  1939 |  struct myri10ge_cmd cmd;
>       |                      ^~~
> drivers/net/ethernet/myricom/myri10ge/myri10ge.c:393:13: error: 'cmd.data2' is used uninitialized in this function [-Werror=uninitialized]
>   393 |  buf->data2 = htonl(data->data2);
> drivers/net/ethernet/myricom/myri10ge/myri10ge.c:1939:22: note: 'cmd.data2' was declared here
>  1939 |  struct myri10ge_cmd cmd;
> 
> [...]

Here is the summary with links:
  - [v4] myri10ge: avoid uninitialized variable use
    https://git.kernel.org/netdev/net-next/c/fd24173439c0

You are awesome, thank you!
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