[PATCH] app/testpmd: fix build on signed comparison

[Ferruh Yigit]

On 7/22/2024 11:52 AM, Ferruh Yigit wrote:
> Build error:
> .../app/test-pmd/config.c: In function 'icmp_echo_config_setup':
> .../app/test-pmd/config.c:5159:30:
>    error: comparison between signed and unsigned integer expressions
>           [-Werror=sign-compare]
>   if ((nb_txq * nb_fwd_ports) < nb_fwd_lcores)
>                               ^
> All 'nb_txq', 'nb_fwd_ports' & 'nb_fwd_lcores' are unsigned variables,
> but the warning is related to the integer promotion rules of C:
> 'nb_txq'       -> uint16_t, promoted to 'int'
> 'nb_fwd_ports' -> uint16_t, promoted to 'int'
> (nb_txq * nb_fwd_ports) -> result 'int'
> nb_fwd_lcores  -> 'uint32_t'
> Ends up comparing 'int' vs 'uint32_t'.
> 
> Fixing by adding the casting back which was initially part of the patch.
> 
> Fixes: 2bf44dd14fa5 ("app/testpmd: fix lcore ID restriction")
> Cc: stable at dpdk.org
> 
> Reported-by: Raslan Darawsheh <rasland at nvidia.com>
> Signed-off-by: Ferruh Yigit <ferruh.yigit at amd.com>
>

Hi Raslan, Ali,

If you can test the patch, as I can't reproduce the build error, I can
quickly merge the fix for -rc3.

Thanks,
ferruh