[PATCH 08/12] net/qede/base: fix build with GCC 12

[Stephen Hemminger]

On Wed, 18 May 2022 12:16:53 +0200
David Marchand <david.marchand at redhat.com> wrote:

> GCC raises the following warning:
> 
> In function ‘_mm256_storeu_si256’,
>     inlined from ‘rte_mov32’ at
>         ../lib/eal/x86/include/rte_memcpy.h:320:2,
>     inlined from ‘rte_mov128’ at
>         ../lib/eal/x86/include/rte_memcpy.h:342:2,
>     inlined from ‘rte_memcpy_generic’ at
>         ../lib/eal/x86/include/rte_memcpy.h:438:4,
>     inlined from ‘rte_memcpy’ at
>         ../lib/eal/x86/include/rte_memcpy.h:882:10,
>     inlined from ‘__ecore_mcp_cmd_and_union’ at
>         ../drivers/net/qede/base/ecore_mcp.c:541:3,
>     inlined from ‘_ecore_mcp_cmd_and_union’ at
>         ../drivers/net/qede/base/ecore_mcp.c:638:2,
>     inlined from ‘ecore_mcp_cmd_and_union’ at
>         ../drivers/net/qede/base/ecore_mcp.c:742:9:
> /usr/lib/gcc/x86_64-redhat-linux/12/include/avxintrin.h:935:8: error:
>         array subscript 1 is outside array bounds of
>         ‘union drv_union_data[1]’ [-Werror=array-bounds]
>   935 |   *__P = __A;
>       |   ~~~~~^~~~~
> ../drivers/net/qede/base/ecore_mcp.c: In function
>         ‘ecore_mcp_cmd_and_union’:
> ../drivers/net/qede/base/ecore_mcp.c:533:30: note: at offset 32 into
>         object ‘union_data’ of size 32
>   533 |         union drv_union_data union_data;
>       |                              ^~~~~~~~~~
> 
> Since this code is in the base driver, waive the check until the base
> driver is fixed by the relevant people.

Even there are two maintainers, haven't heard a response from them.
It could be a real bug.